src - Remote Script fail handling - JavaScript -

in code loading script remote server. here have done:

var loadflag = false; var mywidgetscript = document.createelement("script"); mywidgetscript.type = "text/javascript"; mywidgetscript.charset = "utf-8";  mywidgetscript.src = document.location.protocol+ "//mytest.com/loader"; document.getelementsbytagname("head")[0].appendchild(mywidgetscript); mywidgetscript.onreadystatechange=mywidgetscript.onload = mywidgetscript.onload = function() { loadflag = true; if (!this.readystate || this.readystate == "loaded" || this.readystate == "complete") {         //do want      } }; if(!loadflag){     alert("not loaded"); } 

now want generate alert if script tag has failed load url. incase url has typo or if server mytest.com down. in code generating alert if url correct , server up... wrong code?... can have other way accomplish this..?

try this... may help.

var headtag = document.getelementsbytagname("head")[0];          var jqtag = document.createelement('script');         jqtag.type = 'text/javascript';         jqtag.src = 'your script';          headtag.appendchild(jqtag);  if (jqtag)         {         if (jqtag.readystate)         {             // old versions of ie             jqtag.onreadystatechange = function()             {             if (this.readystate == 'complete' || this.readystate == 'loaded') {                 alert('loaded');             }             };         }         else         {             // other browsers             jqtag.onload = function() {             alert('loaded');             };         }         }