function fillCategory(){ 
 // this function is used to fill the category list on load
addOption(document.drop_list.Category,"Arizona", "Arizona");
addOption(document.drop_list.Category,"California", "California");
}

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

removeAllOptions(document.drop_list.SubCat3);
addOption(document.drop_list.SubCat3, "City", "City", "");
document.drop_list.SubCat3.disabled = false;

if(document.drop_list.Category.value == 'Arizona'){
addOption(document.drop_list.SubCat3,"Phoenix", "Phoenix");
addOption(document.drop_list.SubCat3,"Scottsdale", "Scottsdale");
addOption(document.drop_list.SubCat3,"Tucson", "Tucson");
}

if(document.drop_list.Category.value == 'California'){
addOption(document.drop_list.SubCat3,"Los Angeles", "Los Angeles");
addOption(document.drop_list.SubCat3,"Orange County", "Orange County");
addOption(document.drop_list.SubCat3,"Palm Springs", "Palm Springs");
addOption(document.drop_list.SubCat3,"Sacramento", "Sacramento");
addOption(document.drop_list.SubCat3,"San Diego", "San Diego");
addOption(document.drop_list.SubCat3,"San Francisco", "San Francisco");
}

//end subcat3
}




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);
}