function CheckParams() {
		// check if zipcode is 5 characters long and catch any spaces or alpha in zipcode
		if (( window.document.frmSearch.Zip.value.length  != 5 ) || (! isNum(window.document.frmSearch.Zip.value) )) {
			alert("Please enter a valid 5 digit USPS Zip Code.     ");
			window.document.frmSearch.Zip.focus();
			return false;
		}
		
		if (window.document.frmSearch.Products.value == "") {
			alert("Please select a Product to search on.   ");
			return false;
		}

		return true;
	}
	////	
	function isNum(strA) {
		var strB, num = "0123456789", x;
		for ( x = 0; x < strA.length; x++ ){
			strB = strA.substr(x,1);
			if (num.search(strB) == -1){
				return false;
			}
		}
		return true;
	}