function move(){
	             document.getElementById("mscroll").style.pixelTop=document.body.scrollTop+100;
		         document.getElementById("kefu").style.pixelTop=document.body.scrollTop+100;	
            }   
           


	        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;