function removeCheckBoxBorders()
{
var el = document.getElementsByTagName("input");
for (i=0;i<el.length;i++)
  {
  var type = el[i].getAttribute("type");
  if((type=="checkbox")||(type=="radio"))
    {
	el[i].style.border = "none";
	el[i].style.background = "none";
    }
  }
}

if (window.attachEvent)
{
    var r = window.attachEvent('onload', removeCheckBoxBorders);
}