function SearchZip()
{
	var zip;
	if(TextboxValue("txtZip")=="Zip Code") zip = "";
	else zip = TextboxValue("txtZip");
	
	document.location = "search.php?type=" + SelectedValue("cboType") + "&t=z&zip=" + zip + "&state="+SelectedValue("cboState")+"&country="+SelectedValue("cboCountry");
}

function SelectedValue(combo_id)
{
	return document.getElementById(combo_id).options[document.getElementById(combo_id).selectedIndex].value;
}

function TextboxValue(textbox_id)
{
	return document.getElementById(textbox_id).value;
}