Change Div Position Randomly on Home Page

Change Div position randomly on home page.here is simple example which display a div randomly on homepage within available width and hight.


CODE:

1 :  <Script Langauge="javscript">

2 :  var load=true;

3 :  var div_width=300;

4 :  var div_height=200;

5 :  var top=Math.floor(Math.random()*screen.availHeight - div_height)

6 :  var left=Math.floor(Math.random()*screen.availWidth - div_width)

7 :  document.write("<div id='pic_div' style='border:1px solid black;position:absolute;width:"+div_width+";height:"+div_height+";

8 :  text-align:center;left:0px;top:0px'>a</div>");

9 :  var d_obj=document.getElementById("pic_div");

10 :  d_obj.style.top=top;

11 :  d_obj.style.left=left;

12 :  </script>