如何在JavaScript中验证URL地址？
要在JavaScript中验证URL地址，请使用“regex”，如以下代码所示。返回正确的URL地址为“true”，否则返回“false”
示例
<!DOCTYPE html>
<html>
<body>
<script>
var myURL;
function validURL(myURL) {
var pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
'((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.?)+[a-z]{2,}|'+ // domain name
'((\\d{1,3}\\.){3}\\d{1,3}))'+ // ip (v4) address
'(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*'+ //port
'(\\?[;&a-z\\d%_.~+=-]*)?'+ // query string
'(\\#[-a-z\\d_]*)?$','i');
return pattern.test(myURL);
}
document.write(validURL("http://qries.com"));
</script>
</body>
</html>