function getObj(name) 
{
	var ns4 = (document.layers) ? true : false;
	var w3c = (document.getElementById) ? true : false;
	var ie4 = (document.all) ? true : false;

	if (ns4) return eval('document.' + name);
	if (w3c) return document.getElementById(name);
	if (ie4) return eval('document.all.' + name);
	
	return false;
}

function ValidateZIP()
{
	var oZipField = getObj('zipField');
	
	if (oZipField)
	{
		var strErr = "";

		if (oZipField.value.search(/^\d{5}(-?\d{4})?$/) == -1) 
		{
			strErr = strErr + "Please enter your 5 digit zip code to start the quote.\n";
		}

		if (strErr != "") 
		{
			alert(strErr);
			
			return false;
		}
		
		return true;
        }
        
        return false;
}