function validate(field) {
	var valid = "0123456789 ";
	var ok = "yes";
	var temp;
	for (var i=0; i<field.value.length; i++) {
		temp = "" + field.value.substring(i, i+1);
		if (valid.indexOf(temp) == "-1") {
			ok = "no";
		}
		if (ok == "no") {
			field.value="";
			//alert("Invalid entry!  Only numbers are accepted!");
			field.focus();
			field.select();
   	}
	}
}
function openWin(url,h,w) {
	mywindow = window.open (url,'childWin','scrollbars=no,menubar=no,height='+h+',width='+w+',resizable=yes,toolbar=no,location=no,status=no');
}