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

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

removeAllOptions(document.drop_list.SubCat);
addOption(document.drop_list.SubCat, "", "State/Province", "");
document.drop_list.SubCat.disabled = false;

if(document.drop_list.Category.value == 'UNITED STATES'){
addOption(document.drop_list.SubCat,"ALASKA", "ALASKA");
addOption(document.drop_list.SubCat,"OREGON", "OREGON");
addOption(document.drop_list.SubCat,"WASHINGTON", "WASHINGTON");
}


if(document.drop_list.Category.value == 'CANADA'){
addOption(document.drop_list.SubCat,"ALBERTA", "ALBERTA");
addOption(document.drop_list.SubCat,"BRITISH COLUMBIA", "BRITISH COLUMBIA");
addOption(document.drop_list.SubCat,"SASKATCHEWAN", "SASKATCHEWAN");
}

}


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

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

//Canada
if(document.drop_list.SubCat.value == 'ALBERTA'){
addOption(document.drop_list.SubCat3,"1", "CALGARY");
addOption(document.drop_list.SubCat3,"2", "EDMONTON");
addOption(document.drop_list.SubCat3,"13", "RED DEER");
}

if(document.drop_list.SubCat.value == 'BRITISH COLUMBIA'){
addOption(document.drop_list.SubCat3,"3", "VANCOUVER AIRPORT");
//addOption(document.drop_list.SubCat3,"4", "SURREY");
addOption(document.drop_list.SubCat3,"5", "VANCOUVER");
addOption(document.drop_list.SubCat3,"6", "VICTORIA");
addOption(document.drop_list.SubCat3,"7", "WHISTLER");
}

if(document.drop_list.SubCat.value == 'SASKATCHEWAN'){
addOption(document.drop_list.SubCat3,"8", "SASKATOON");
}

///UNITED STATES
if(document.drop_list.SubCat.value == 'ALASKA'){
addOption(document.drop_list.SubCat3,"9", "ANCHORAGE");
}

if(document.drop_list.SubCat.value == 'WASHINGTON'){
addOption(document.drop_list.SubCat3,"10", "BELLEVUE");
addOption(document.drop_list.SubCat3,"11", "SEATTLE", "");
}

if(document.drop_list.SubCat.value == 'OREGON'){
addOption(document.drop_list.SubCat3,"12", "PORTLAND");
}

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

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);
}