Question

86

Javascript: document.getElementById() returns NULL

rated 0 times [ 89] [ 3] / answers: 1 / hits: 101946 / 13 Years ago, tue, may 24, 2011, 12:00:00

I am quite new with Javascript and I got a problem with document.getElementById() that always returns NULL, and that's driving me nuts.

I have a element in my code and I want to get its coordinates so I can move it.

Here is the code:

<html>

  <head>

    <script type=text/javascript >

      function MoveIt(obj) {

        alert(obj); // returns Object HTMLDivElement

        var xx = document.getElementById(arect);



        if(document.getElementById(arect).value == null) {

          alert('NULL >> ' + xx.value);

        }

        else {

          alert('NOT NULL >>' + xx.value);

        }



        posX = xx.style.scrollTop;

        posY = xx.style.left;

      }

    </script>

  </head>



  <body bgcolor=white >

    <DIV class=background id=MyDiv2>  

      <div id=arect name=arect class=transbox onmousedown=MoveIt(this); >

      </div>

    </div>

  </body>

</html>