function validateZip( vField, vEdits )    { 
// Author:  Mark Thompson, Univar USA.
// Purpose: Test if ZIP code not null, contains numbers and has either 5 or 9 numbers.  Reformat //with a dash if 9 numbers detected. (i.e. nnnnn-nnnn).  Return false and message if ZIP is invalid.  
// Subroutines used:  alertBox, strip_chars
	var zip_str = strip_chars(vField.value, " -_");
	var zip_len = zip_str.length;
	var errormessage = "Please enter a valid ZIP Code.  ZIP Code should be either 5 or 9 digits.";

	if (vEdits != null) {
		if ( (vEdits.indexOf("nr") > -1) || (vEdits.indexOf("NR") > -1) ) { 
			if (zip_str == "") {
		      		vField.value = "";
				return true;
			  }
		  }
	  }
	if ((zip_len != 9) && (zip_len != 5 )) {
		alertBox (vField, errormessage, "text");
		return false;
	} else {
		for (var j = 0; j < zip_len; j++) {
			var ch = zip_str.substring(j, j+1);
			if ((ch < "0") || (ch > "9")) {
				alertBox (vField, errormessage, "text");
				return false;
			}
		}
	}
    	if (zip_len == 9) {
 		vField.value = zip_str.substring(0,5) + "-" + zip_str.substring(5,9);
	} else {
 		vField.value = zip_str;
	}
     	return true;

// ends the function validateZip
}

function ValidateZip( vField, vEdits )    { 
	return validateZip( vField, vEdits );
}
function validateZIP( vField, vEdits )    { 
	return validateZip( vField, vEdits );
}