var mydiv;
document.onmousemove=getMouseCoord;

function loadMouseDiv()
{
mydiv = document.getElementById("mousediv");
}

function getMouseCoord(event)
{
 ev = event || window.event;
 if (!mydiv) {mydiv = document.getElementById("mousediv"); }
 if (mydiv) {mydiv.innerHTML = " Mouse: x="+ev.clientX + " y="+ev.clientY;}
}