function fillCategory(){ 
 // this function is used to fill the category list on load
addOption(document.drop_list.Category, "0-50 miles", "0-50 miles", "");
addOption(document.drop_list.Category, "51-60 miles", "51-60 miles", "");
addOption(document.drop_list.Category, "61-70 miles", "61-70 miles", "");
addOption(document.drop_list.Category, "71-80 miles", "71-80 miles", "");
addOption(document.drop_list.Category, "81-90 miles", "81-90 miles", "");
addOption(document.drop_list.Category, "91-100 miles", "91-100 miles", "");
addOption(document.drop_list.Category, "101-110 miles", "101-110 miles", "");
addOption(document.drop_list.Category, "111-120 miles", "111-120 miles", "");
addOption(document.drop_list.Category, "121-130 miles", "121-130 miles", "");
addOption(document.drop_list.Category, "131-140 miles", "131-140 miles", "");
addOption(document.drop_list.Category, "141-150 miles", "141-150 miles", "");
addOption(document.drop_list.Category, "151-160 miles", "151-160 miles", "");
addOption(document.drop_list.Category, "161-170 miles", "161-170 miles", "");
addOption(document.drop_list.Category, "171-180 miles", "171-180 miles", "");
addOption(document.drop_list.Category, "181-190 miles", "181-190 miles", "");
addOption(document.drop_list.Category, "191-200 miles", "191-200 miles", "");
addOption(document.drop_list.Category, "201-250 miles", "201-250 miles", "");
addOption(document.drop_list.Category, "251-300 miles", "251-300 miles", "");
addOption(document.drop_list.Category, "301-350 miles", "301-350 miles", "");
addOption(document.drop_list.Category, "350+ miles", "350+ miles", "");



}

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

//removeAllOptions(document.drop_list.SubCat);


if(document.drop_list.Category.value == '0-50 miles'){
document.drop_list.SubCat.value ="£47.50";
}
if(document.drop_list.Category.value == '51-60 miles'){
document.drop_list.SubCat.value ="£57";

}
if(document.drop_list.Category.value == '61-70 miles'){
document.drop_list.SubCat.value ="£66.50";

}
if(document.drop_list.Category.value == '71-80 miles'){
document.drop_list.SubCat.value ="£76";

}
if(document.drop_list.Category.value == '81-90 miles'){
document.drop_list.SubCat.value ="£85.50";
}
if(document.drop_list.Category.value == '91-100 miles'){
document.drop_list.SubCat.value ="£95";
}
if(document.drop_list.Category.value == '101-110 miles'){
document.drop_list.SubCat.value ="£104.50";
}
if(document.drop_list.Category.value == '111-120 miles'){
document.drop_list.SubCat.value ="£114";
}
if(document.drop_list.Category.value == '121-130 miles'){
document.drop_list.SubCat.value ="£123.50";
}
if(document.drop_list.Category.value == '131-140 miles'){
document.drop_list.SubCat.value ="£133";
}
if(document.drop_list.Category.value == '141-150 miles'){
document.drop_list.SubCat.value ="£142.50";
}
if(document.drop_list.Category.value == '151-160 miles'){
document.drop_list.SubCat.value ="£152";
}
if(document.drop_list.Category.value == '161-170 miles'){
document.drop_list.SubCat.value ="£161.50";
}
if(document.drop_list.Category.value == '171-180 miles'){
document.drop_list.SubCat.value ="£171";
}
if(document.drop_list.Category.value == '181-190 miles'){
document.drop_list.SubCat.value ="£180.50";
}
if(document.drop_list.Category.value == '191-200 miles'){
document.drop_list.SubCat.value ="£190";
}
if(document.drop_list.Category.value == '201-250 miles'){
document.drop_list.SubCat.value ="£237.50";
}
if(document.drop_list.Category.value == '251-300 miles'){
document.drop_list.SubCat.value ="£285";
}
if(document.drop_list.Category.value == '301-350 miles'){
document.drop_list.SubCat.value ="£332.50";
}
if(document.drop_list.Category.value == '350+ miles'){
document.drop_list.SubCat.value ="Please call 01443837628";
}



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

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);
}