document.onmousemove = mouseMove; 
var mousePos; 
function mouseMove(ev) {   
    mousePos = mouseCoords(ev);    
}   

function mouseCoords(ev) { 
    ev= ev || window.event;   
    if (ev.pageX || ev.pageY) {   
        return {   
            x : ev.pageX,   
            y : ev.pageY   
        };   
    }
    else
    {
     return {
         x : ev.x + document.documentElement.scrollLeft, 
         y : ev.y + document.documentElement.scrollTop   
    };
    }   
}
function zwgk_onmousemove(str){
		var  obj= document.getElementById(str);
		obj.style.display = "block";
		obj.style.top =  mousePos.y-document.body.scrollTop + 15 + "px";
		obj.style.left = mousePos.x-document.body.scrollLeft + 15 + "px";
	}
function zwgk_onmouseout(str){
		var obj = document.getElementById(str);
		obj.style.display = "none";
	}