function image_over(obj)
{
	var imgSrc=obj.src;
	//alert(imgSrc+"Id->"+obj.id);

	if(document.getElementById('lastImageSelectedID').value!=''&&obj.id!=document.getElementById('lastImageSelectedID').value)
	{

		var lastImgSrc=document.getElementById('lastImageSelectedSrc').value;
		var newImgSrc=lastImgSrc.replace(/_over(\.[a-z0-9]+)$/i,'$1');
		//alert(newImgSrc);
		var lastImgID=document.getElementById('lastImageSelectedID').value;
		document.getElementById(lastImgID).src=newImgSrc;
	}
	if(document.getElementById('lastImageSelectedSrc').value!=imgSrc)
	{
		var imgFileName=imgSrc.replace(/(\.[a-z0-9]+)$/i,'_over$1');
		//alert("new img="+imgFileName);
		var newImgSrc=imgFileName;
		obj.src=newImgSrc;
		document.getElementById('lastImageSelectedID').value=obj.id;
		document.getElementById('lastImageSelectedSrc').value=newImgSrc;
	}
}