javascriptdojox.gfx

Remove all the children DOM elements in div

I have the following dojo codes to create a surface graphics element under a div:

....
<script type=text/javascript>
....
   function drawRec(){
      var node = dojo.byId("surface");
      //   remove all the children graphics
      var surface = dojox.gfx.createSurface(node, 600, 600);

      surface.createLine({
         x1 : 0,
         y1 : 0,
         x2 : 600,
         y2 : 600
      }).setStroke("black");
   }
....
</script>
....
<body>
<div id="surface"></div>
....

drawRec() will draw a rectangle graphics first time. If I call this function again in an anchor href like this:

 <a href="javascript:drawRec();">...</a>

it will draw another graphics again. What I need to clean all the graphics under the div and then create again. How can I add some dojo codes to do that?

Solution 
  • while (node.hasChildNodes()) {
    node.removeChild(node.lastChild);
}