看脚本:
var nav,old,iex=(document.all),yyy=-1000;
var hand=0;
if(navigator.appName=="Netscape"){(document.layers)?nav=true:old=true;}
Xoffset=0;
Yoffset=0;
if(!old) {
    var skn=(nav)? document.dek : dek.style;
    if(nav)document.captureEvents(Event.MOUSEMOVE);
    document.onmousemove=get_mouse;
}
function popup(hand,hand2,imgSRC) {
    Xoffset=hand;
    Yoffset=hand2;
    var content="

";
    if(old) {
        alert(msg);return;
    } 
    else {
        yyy=Yoffset;
         if(nav) {
            skn.document.write(content);skn.document.close();skn.visibility="visible"
        }
         if(iex) {
            document.all("dek").innerHTML=content;skn.visibility="visible"
        }
     }
}
function get_mouse(e) {    
    var x=(nav)?e.pageX:event.x+document.body.scrollLeft;skn.left=x+Xoffset;
    if(nav)var y=e.pageY;
    if(iex) {
        y=event.y;if(navigator.appVersion.indexOf("MSIE 4")==-1)y+=document.body.scrollTop
    }
    skn.top=y+yyy;
}
function kill() {
    if(!old) {
        yyy=-1000;skn.visibility="hidden";
    }
}
应用的时候: