function fillBikeModel(){ 
 // this function is used to fill the category list on load
	removeAllOptions(document.drop_list.BikeModel);
	addOption(document.drop_list.BikeModel, "", " --SELECT BIKE MODEL-- ", "");
	addOption(document.drop_list.BikeModel, "Yamaha Roadstar, Warrior, Raider", "Yamaha Roadstar, Warrior, Raider", "");
}

function SelectBikeYear(){
// ON selection of category this function will work
	removeAllOptions(document.drop_list.BikeYear);
	addOption(document.drop_list.BikeYear, "", " --SELECT BIKE YEAR-- ", "");

	if(document.drop_list.BikeModel.value == 'Yamaha Roadstar, Warrior, Raider'){
		addOption(document.drop_list.BikeYear,"Yamaha Roadstar, Warrior, Raider, 1999-2010", "1999-2010");
	}
}

function Selectproductpr1(){
	removeAllOptions(document.drop_list.productpr1);
	addOption(document.drop_list.productpr1, "", " --SELECT OIL COOLER MODEL-- ", "");

	if(document.drop_list.BikeYear.value == 'Yamaha Roadstar, Warrior, Raider, 1999-2010'){
		addOption(document.drop_list.productpr1,"", "None (adapter kit only)");
		addOption(document.drop_list.productpr1,"1000 Deluxe Oil Cooler Kit for Yamaha Roadstar, Warrior, Raider, 1999-2010:225.95:2.95", "1000 Deluxe Oil Cooler Kit $225.95");
		addOption(document.drop_list.productpr1,"1100 Chrome Oil Cooler Kit for Yamaha Roadstar, Warrior, Raider, 1999-2010:299.95:3.20", "1100 Chrome Oil Cooler Kit $299.95");
		addOption(document.drop_list.productpr1,"1200 Slimline Oil Cooler Kit for Yamaha Roadstar, Warrior, Raider, 1999-2010:179.95:2.50", "1200 Slimline Oil Cooler Kit $179.95");

	}
}

function Selectproductpr2(){
// ON slection of subcategory this funciton will work
	removeAllOptions(document.drop_list.productpr2);
	addOption(document.drop_list.productpr2, "", " --SELECT JAGG ADAPTER-- ", "");

	if(document.drop_list.productpr1.value == ''){
		addOption(document.drop_list.productpr2,"4800 Oil Filter Adapter for Yamaha Roadstar, Warrior, Raider, 1999-2010:114.95:0.95", "4800 Oil Filter Adapter $114.95");
	}
	if(document.drop_list.productpr1.value == '1000 Deluxe Oil Cooler Kit for Yamaha Roadstar, Warrior, Raider, 1999-2010:225.95:2.95'){
		addOption(document.drop_list.productpr2,"4800 Oil Filter Adapter for Yamaha Roadstar, Warrior, Raider, 1999-2010:114.95:0.95", "4800 Oil Filter Adapter $114.95");
	}
	if(document.drop_list.productpr1.value == '1100 Chrome Oil Cooler Kit for Yamaha Roadstar, Warrior, Raider, 1999-2010:299.95:3.20'){
		addOption(document.drop_list.productpr2,"4800 Oil Filter Adapter for Yamaha Roadstar, Warrior, Raider, 1999-2010:114.95:0.95", "4800 Oil Filter Adapter $114.95");
	}
	if(document.drop_list.productpr1.value == '1200 Slimline Oil Cooler Kit for Yamaha Roadstar, Warrior, Raider, 1999-2010:179.95:2.50'){
		addOption(document.drop_list.productpr2,"4800 Oil Filter Adapter for Yamaha Roadstar, Warrior, Raider, 1999-2010:114.95:0.95", "4800 Oil Filter Adapter $114.95");
	}

}

function Selectproductpr3(){
// ON slection of subcategory this funciton will work
	removeAllOptions(document.drop_list.productpr3);
	addOption(document.drop_list.productpr3, "", " --SELECT JAGG ACCESSORIES-- ", "");

	if(document.drop_list.productpr2.value == '4800 Oil Filter Adapter for Yamaha Roadstar, Warrior, Raider, 1999-2010:114.95:0.95'){
		addOption(document.drop_list.productpr3,"", "None");
	}
}



////////////////// 

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);
}