function highit()
{
	document.frmSearch.zip.value="";
	document.frmSearch.zip.focus();
}

function validateZIP(field) 
{
var valid = "0123456789-";
var hyphencount = 0;

	if (field.length!=5 && field.length!=10) 
	{
		alert("Please enter your 5 digit zip code.  Please try again.");
		return false;
	}
	
	for (var i=0; i < field.length; i++) 
	{
		temp = "" + field.substring(i, i+1);
		if (temp == "-") hyphencount++;
		if (valid.indexOf(temp) == "-1") 
		{
			alert("Invalid characters in your zip code.  Please try again.");
			return false;
		}
		if ((hyphencount > 1) || ((field.length==10) && ""+field.charAt(5)!="-")) 
		{
			alert("Please enter your 5 digit zip code.  Please try again.");
			return false;
		}	
	}	
	return true;
}