]<script>
window.onload = function(){
var oCursor = document.getElementById("cursor");
document.onmousemove=function (ev){
var oEvent=ev||event,
oWidth = document.documentElement.clientWidth,
oHeight = document.documentElement.clientHeight,
scrollTop=document.documentElement.scrollTop + oEvent.clientY,
scrollLeft=document.documentElement.scrollLeft + oEvent.clientX;
if(scrollTop > oHeight-oCursor.offsetHeight){
oCursor.style.top = oHeight-oCursor.offsetHeight+'px';
}else if(scrollTop < 0){
oCursor.style.top = 0;
}else{
oCursor.style.top = scrollTop+'px';
}
if(scrollLeft > oWidth-oCursor.offsetWidth){
oCursor.style.left = oWidth-oCursor.offsetWidth+'px';
}else{
oCursor.style.left = scrollLeft+'px';
}
document.onmousedown = function(){
oCursor.innerHTML = "<img src='http://www.jb51.net/jscss/demoimg/201305/cursor_hover.png' / alt="Js mouse follow code small hand click instance method_javascript skills" >";
return false;
}
document.onmouseup = function(){
oCursor.innerHTML = "<img src='http://www.jb51.net/jscss/demoimg/201305/cursor.png' / alt="Js mouse follow code small hand click instance method_javascript skills" >";
}
};
}
</script>