function move()
	        {
	             document.getElementById("mscroll").style.pixelTop=document.body.scrollTop+150;
		         document.getElementById("kefu").style.pixelTop=document.body.scrollTop+150;
	        }
	function Mouse()
	        {
	            document.getElementById("mscroll").style.display = "block";
	            document.getElementById("kefu").style.display = "none";
	        }
	function Out()
	        {
	            document.getElementById("mscroll").style.display = "none";
	            document.getElementById("kefu").style.display = "block";
	        }
	 window.onscroll=move;