Two ways to determine whether the URL is valid in js_javascript skills

function CheckStatus(url)
{
XMLHTTP = new ActiveXObject("Microsoft.XMLHTTP")
XMLHTTP.open("HEAD",url,false)
XMLHTTP. send ()
                                                                                                                                                                                                                                                                            
     }



Method 2: (Using jquery, applicable to all browsers)

url: "http://www.jb51.net",
       data: "",
          success: function() {
                                                                                                                   () {
                                                                                             
}