function createBack(obj)
{
	if(!obj)return;
	//alert(obj.id);
	tempIFrame=document.getElementById(obj.id+'backIframe')
	if(!tempIFrame)
	{
		var tempIFrame=document.createElement('iframe');
		tempIFrame.setAttribute('id',obj.id+'backIframe');
	}
	
	tempIFrame.style.position='absolute';
	tempIFrame.style.top=obj.offsetTop;
	tempIFrame.style.left=obj.offsetLeft;
	tempIFrame.style.width=obj.offsetWidth;
	tempIFrame.style.height=obj.offsetHeight;
	tempIFrame.style.display='block';
	IFrameObj = document.body.appendChild(tempIFrame);
}

function removeBack(obj)
{
	if(!obj)return;
	//tempIFrame.style.display='none';
	//return;
	if(document.getElementById(obj.id+'backIframe'))
		document.body.removeChild(document.getElementById(obj.id+'backIframe'));
}