function fillCategory(){ 
 // this function is used to fill the category list on load
addOption(document.drop_list.Category, "Coach", "Coach", "");
addOption(document.drop_list.Category, "Charter", "Charter", "");
addOption(document.drop_list.Category, "School Bus", "School Bus", "");
addOption(document.drop_list.Category, "City Bus", "City Bus", "");
}

function SelectSubCat(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat);
addOption(document.drop_list.SubCat, "", "select one", "");

if(document.drop_list.Category.value == 'Coach'){
addOption(document.drop_list.SubCat,"Scania K114IB", "Scania K114IB");
addOption(document.drop_list.SubCat,"Scania K124IB", "Scania K124IB");
addOption(document.drop_list.SubCat,"Scania K124EB", "Scania K124EB");
addOption(document.drop_list.SubCat,"Scania K380", "Scania K380");
addOption(document.drop_list.SubCat,"Scania K420", "Scania K420");
addOption(document.drop_list.SubCat,"Volvo B12", "Volvo B12");
addOption(document.drop_list.SubCat,"Volvo B7R", "Volvo B7R");
addOption(document.drop_list.SubCat,"MAN 15280", "MAN 15280");
addOption(document.drop_list.SubCat,"MAN 12220", "MAN 12220");
addOption(document.drop_list.SubCat,"Hino FG", "Hino FG");
addOption(document.drop_list.SubCat,"Mitsubishi FM250", "Mitsubishi FM250");
addOption(document.drop_list.SubCat,"King Long", "King Long");
}
if(document.drop_list.Category.value == 'Charter'){
addOption(document.drop_list.SubCat,"Hino FG", "Hino FG");
addOption(document.drop_list.SubCat,"Hino GD", "Hino GD");
addOption(document.drop_list.SubCat,"Mitsubishi FM250", "Mitsubishi FM250", "");
addOption(document.drop_list.SubCat,"Iveco ML150", "Iveco ML150", "");
addOption(document.drop_list.SubCat,"Iveco ML100", "Iveco ML100", "");
}
if(document.drop_list.Category.value == 'School Bus'){
addOption(document.drop_list.SubCat,"Hino FG", "Hino FG");
addOption(document.drop_list.SubCat,"Hino FD", "Hino FD");
addOption(document.drop_list.SubCat,"Hino FC", "Hino FC");
addOption(document.drop_list.SubCat,"Mitsubishi FK220", "Mitsubishi FK220");
addOption(document.drop_list.SubCat,"King Long", "King Long");
}
if(document.drop_list.Category.value == 'City Bus'){
addOption(document.drop_list.SubCat,"Volvo B7RLE 2A", "Volvo B7RLE 2A");
addOption(document.drop_list.SubCat,"Volvo B7RLE 3A", "Volvo B7RLE 3A");
addOption(document.drop_list.SubCat,"Scania K270UB", "Scania K270UB");
addOption(document.drop_list.SubCat,"Scania K94UB", "Scania K94UB");
addOption(document.drop_list.SubCat,"Volgren Body", "Volgren Body");
addOption(document.drop_list.SubCat,"MAN 15220 2A", "MAN 15220 2A");
addOption(document.drop_list.SubCat,"MAN 15220 3A", "MAN 15220 3A");
addOption(document.drop_list.SubCat,"King Long", "King Long");
}

}
////////////////// 

function SelectSubCat2(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat2);
addOption(document.drop_list.SubCat2, "", "select one", "");

/// COACH - LENGHT ////
if(document.drop_list.SubCat.value == 'Scania K114IB'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
}
if(document.drop_list.SubCat.value == 'Scania K124IB'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
}
if(document.drop_list.SubCat.value == 'Scania K124EB'){
addOption(document.drop_list.SubCat2,"13.5", "13.5");
}
if(document.drop_list.SubCat.value == 'Scania K380'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
addOption(document.drop_list.SubCat2,"13.5", "13.5");
}
if(document.drop_list.SubCat.value == 'Scania K420'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
addOption(document.drop_list.SubCat2,"13.5", "13.5");
}
if(document.drop_list.SubCat.value == 'Volvo B12'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
addOption(document.drop_list.SubCat2,"13.5", "13.5");
}
if(document.drop_list.SubCat.value == 'Volvo B7R'){
addOption(document.drop_list.SubCat2,"10.6", "10.6");
}
if(document.drop_list.SubCat.value == 'MAN 15280'){
addOption(document.drop_list.SubCat2,"10.5", "10.5");
addOption(document.drop_list.SubCat2,"11.5", "11.5");
}
if(document.drop_list.SubCat.value == 'MAN 12220'){
addOption(document.drop_list.SubCat2,"9", "9");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat2,"11.4", "11.4");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat2,"11", "11");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat2,"11", "11");
}

/// CHARTER - LENGHT ///
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat2,"11.9", "11.9");
}
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Hino GD'){
addOption(document.drop_list.SubCat2,"9", "9");
}
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat2,"11.9", "11.9");
}
if(document.drop_list.SubCat.value == 'Iveco ML150'){
addOption(document.drop_list.SubCat2,"11.7", "11.7");
}
if(document.drop_list.SubCat.value == 'Iveco ML100'){
addOption(document.drop_list.SubCat2,"9.3", "9.3");
}

/// SCHOOL BUS - LENGHT ///
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat2,"11.2", "11.2");
addOption(document.drop_list.SubCat2,"12.2", "12.2");
}
if(document.drop_list.SubCat.value == 'Hino FD'){
addOption(document.drop_list.SubCat2,"10.8", "10.8");
}
if(document.drop_list.SubCat.value == 'Hino FC'){
addOption(document.drop_list.SubCat2,"10.7", "10.7");
}
if(document.drop_list.SubCat.value == 'Mitsubishi FK220'){
addOption(document.drop_list.SubCat2,"11.1", "11.1");
}
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat2,"10.5", "10.5");
}

/// CITY BUS - LENGHT ///
if(document.drop_list.SubCat.value == 'Volvo B7RLE 2A'){
addOption(document.drop_list.SubCat2,"11.5", "11.5");
addOption(document.drop_list.SubCat2,"12.2", "12.2");
}
if(document.drop_list.SubCat.value == 'Volvo B7RLE 3A'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
}
if(document.drop_list.SubCat.value == 'Scania K270UB'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
addOption(document.drop_list.SubCat2,"13.5", "13.5");
}
if(document.drop_list.SubCat.value == 'Scania K94UB'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
}
if(document.drop_list.SubCat.value == 'Volgren Body'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
addOption(document.drop_list.SubCat2,"13.5", "13.5");
}
if(document.drop_list.SubCat.value == 'MAN 15220 2A'){
addOption(document.drop_list.SubCat2,"11.5", "11.5");
}
if(document.drop_list.SubCat.value == 'MAN 15220 3A'){
addOption(document.drop_list.SubCat2,"12.6", "12.6");
}
if(document.drop_list.Category.value == 'City Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat2,"10.5", "10.5");
}

}
////////////////// 

function SelectSubCat3(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat3);
addOption(document.drop_list.SubCat3, "", "select one", "");

/// COACH - DOORS ///
if(document.drop_list.SubCat.value == 'Scania K114IB'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Scania K124IB'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Scania K124EB'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Scania K380'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Scania K420'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Volvo B12'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Volvo B7R'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'MAN 15280'){
addOption(document.drop_list.SubCat3,"1", "1");
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'MAN 12220'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat3,"1", "1");
}

/// CHARTER - DOORS ///
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'Hino GD'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'Iveco ML150'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'Iveco ML100'){
addOption(document.drop_list.SubCat3,"1", "1");
}

/// SCHOOL BUS - DOORS ///
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'Hino FD'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'Hino FC'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.SubCat.value == 'Mitsubishi FK220'){
addOption(document.drop_list.SubCat3,"1", "1");
}
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat3,"1", "1");
}

/// CITY BUS - DOORS ///
if(document.drop_list.SubCat.value == 'Volvo B7RLE 2A'){
addOption(document.drop_list.SubCat3,"1", "1");
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Volvo B7RLE 3A'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Scania K270UB'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Scania K94UB'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'Volgren Body'){
addOption(document.drop_list.SubCat3,"1", "1");
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'MAN 15220 2A'){
addOption(document.drop_list.SubCat3,"1", "1");
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.SubCat.value == 'MAN 15220 3A'){
addOption(document.drop_list.SubCat3,"2", "2");
}
if(document.drop_list.Category.value == 'City Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat3,"1", "1");
addOption(document.drop_list.SubCat3,"2", "2");
}

}
////////////////// 

function SelectSubCat4(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat4);
addOption(document.drop_list.SubCat4, "", "select one", "");

/// COACH - SEATS ///
if(document.drop_list.SubCat.value == 'Scania K114IB'){
addOption(document.drop_list.SubCat4,"49 to 54", "49 to 54");
}
if(document.drop_list.SubCat.value == 'Scania K124IB'){
addOption(document.drop_list.SubCat4,"49 to 54", "49 to 54");
}
if(document.drop_list.SubCat.value == 'Scania K124EB'){
addOption(document.drop_list.SubCat4,"49 to 54", "49 to 54");
}
if(document.drop_list.SubCat.value == 'Scania K380'){
addOption(document.drop_list.SubCat4,"49 to 54", "49 to 54");
}
if(document.drop_list.SubCat.value == 'Scania K420'){
addOption(document.drop_list.SubCat4,"49 to 54", "49 to 54");
}
if(document.drop_list.SubCat.value == 'Volvo B12'){
addOption(document.drop_list.SubCat4,"49 to 54", "49 to 54");
}
if(document.drop_list.SubCat.value == 'Volvo B7R'){
addOption(document.drop_list.SubCat4,"45", "45");
}
if(document.drop_list.SubCat.value == 'MAN 15280'){
addOption(document.drop_list.SubCat4,"40 - 45", "40 - 45");
}
if(document.drop_list.SubCat.value == 'MAN 12220'){
addOption(document.drop_list.SubCat4,"-", "-");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat4,"46", "46");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat4,"38 - 45", "38 - 45");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat4,"29 - 37", "29 - 37");
}

/// CHARTER - SEATS ///
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat4,"53", "53");
}
if(document.drop_list.SubCat.value == 'Hino GD'){
addOption(document.drop_list.SubCat4,"41", "41");
}
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat4,"41 - 53", "41 - 53");
}
if(document.drop_list.SubCat.value == 'Iveco ML150'){
addOption(document.drop_list.SubCat4,"53", "53");
}
if(document.drop_list.SubCat.value == 'Iveco ML100'){
addOption(document.drop_list.SubCat4,"30", "30");
}

/// SCHOOL BUS - SEATS ///
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat4,"45 - 57", "45 - 57");
}
if(document.drop_list.SubCat.value == 'Hino FD'){
addOption(document.drop_list.SubCat4,"45", "45");
}
if(document.drop_list.SubCat.value == 'Hino FC'){
addOption(document.drop_list.SubCat4,"32 - 45", "32 - 45");
}
if(document.drop_list.SubCat.value == 'Mitsubishi FK220'){
addOption(document.drop_list.SubCat4,"48", "48");
}
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat4,"33 - 45", "33 - 45");
}

/// CITY BUS - SEATS ///
if(document.drop_list.SubCat.value == 'Volvo B7RLE 2A'){
addOption(document.drop_list.SubCat4,"43", "43");
addOption(document.drop_list.SubCat4,"47", "47");
}
if(document.drop_list.SubCat.value == 'Volvo B7RLE 3A'){
addOption(document.drop_list.SubCat4,"47 - 51", "47 - 51");
}
if(document.drop_list.SubCat.value == 'Scania K270UB'){
addOption(document.drop_list.SubCat4,"47 - 51", "47 - 51");
}
if(document.drop_list.SubCat.value == 'Scania K94UB'){
addOption(document.drop_list.SubCat4,"47 - 51", "47 - 51");
}
if(document.drop_list.SubCat.value == 'Volgren Body'){
addOption(document.drop_list.SubCat4,"43 - 51", "43 - 51");
}
if(document.drop_list.SubCat.value == 'MAN 15220 2A'){
addOption(document.drop_list.SubCat4,"43 - 47", "43 - 47");
}
if(document.drop_list.SubCat.value == 'MAN 15220 3A'){
addOption(document.drop_list.SubCat4,"47 - 51", "47 - 51");
}
if(document.drop_list.Category.value == 'City Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat4,"31", "31");
}

}
////////////////// 

function SelectSubCat5(){
// ON selection of category this function will work

removeAllOptions(document.drop_list.SubCat5);
addOption(document.drop_list.SubCat5, "", "select one", "");

/// COACH - STARS ///
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Scania K114IB'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Scania K124IB'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Scania K124EB'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Scania K380'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Scania K420'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Volvo B12'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Volvo B7R'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'MAN 15280'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'MAN 12220'){
addOption(document.drop_list.SubCat5,"-", "-");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}
if(document.drop_list.Category.value == 'Coach' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat5,"5", "5");
addOption(document.drop_list.SubCat5,"4", "4");
addOption(document.drop_list.SubCat5,"3", "3");
addOption(document.drop_list.SubCat5,"2", "2");
}	

/// CHARTER - STARS ///
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat5,"3", "3");
}
if(document.drop_list.SubCat.value == 'Hino GD'){
addOption(document.drop_list.SubCat5,"3", "3");
}
if(document.drop_list.Category.value == 'Charter' && document.drop_list.SubCat.value == 'Mitsubishi FM250'){
addOption(document.drop_list.SubCat5,"3", "3");
}
if(document.drop_list.SubCat.value == 'Iveco ML150'){
addOption(document.drop_list.SubCat5,"3", "3");
}
if(document.drop_list.SubCat.value == 'Iveco ML100'){
addOption(document.drop_list.SubCat5,"3", "3");
}

/// SCHOOL BUS - STARS ///
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'Hino FG'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Hino FD'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Hino FC'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Mitsubishi FK220'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.Category.value == 'School Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}

/// CITY BUS - STARS ///
if(document.drop_list.SubCat.value == 'Volvo B7RLE 2A'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Volvo B7RLE 3A'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Scania K270UB'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Scania K94UB'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'Volgren Body'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'MAN 15220 2A'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.SubCat.value == 'MAN 15220 3A'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}
if(document.drop_list.Category.value == 'City Bus' && document.drop_list.SubCat.value == 'King Long'){
addOption(document.drop_list.SubCat5,"N/A", "N/A");
}

}
////////////////// 

function removeAllOptions(selectbox)
{
	var i;
	for(i=selectbox.options.length-1;i>=0;i--)
	{
		//selectbox.options.remove(i);
		selectbox.remove(i);
	}
}

function addOption(selectbox, value, text )
{
	var optn = document.createElement("OPTION");
	optn.text = text;
	optn.value = value;

	selectbox.options.add(optn);
}