复制代码代码如下:
^((https?|ftp|news):////)?([a-z]([a-z0-9/-]*[/.。])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))(//[a-z0-9_/-/.~]+)*(//([a-z0-9_/-/.]*)(/?[a-z0-9+_/-/.%=&]*)?)?(#[a-z][a-z0-9_]*)?$
实例：
复制代码代码如下:
<script type="text/javascript">
function IsURL(urlString)
{
regExp = /^((https?|ftp|news):////)?([a-z]([a-z0-9/-]*[/.。])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))(//[a-z0-9_/-/.~]+)*(//([a-z0-9_/-/.]*)(/?[a-z0-9+_/-/.%=&]*)?)?(#[a-z][a-z0-9_]*)?$/
if (urlString.match(regExp))
return "is a url";
else
return "not a url";
}
url = "";
alert(IsURL(url));
</script>
