能跨越所有窗口的图片(IE5.5以上)，缩小窗口观看

作者：来源：日期：2004-9-30
缩小窗口观察
<SCRIPT LANGUAGE="JavaScript1.2">
<!--

/*
Bouncing Image script II (By Dheera Venkatraman dheera@usa.net)
Submitted to and modified by Dynamic Drive for code enhancements
For full source, usage terms, and 100's more DHTML scripts, visit http://dynamicdrive.com
*/


//1) specify path to image//图片的路径
var imagepath="http://www.itpow.com/images/cftea.gif"

//2) specify image dimensions//图片的大小
var imagewidth=135
var imageheight=60

//3) change this to adjust speed (lower is slower)//速度
var speed=8;

//4) configure what should happen when user clicks on image
//A value of "dismiss" will dismiss it, while a URL will cause the browser to navigate to it
var imageclick="dismiss"

//5) Finally, configure when the image should automatically disappear, in seconds (0=perpetual)
var hideafter=0

////No editing required beyond this point/////////////////

var isie=0;
if(window.navigator.appName=="Microsoft Internet Explorer"&&window.navigator.appVersion.substring(window.navigator.appVersion.indexOf("MSIE")+5,window.navigator.appVersion.indexOf("MSIE")+8)>=5.5) {
  isie=1;
}
else {
  isie=0;
}

if(isie){
var preloadit=new Image()
preloadit.src=imagepath
}


function pop() {
  if(isie) {
    x=x+dx;y=y+dy;
    oPopup.show(x, y, imagewidth, imageheight);
    if(x+imagewidth+5>screen.width) dx=-dx;
    if(y+imageheight+5>screen.height) dy=-dy;
    if(x<0) dx=-dx;
    if(y<0) dy=-dy;
    startani=setTimeout("pop();",50);
  }
}

function dismisspopup(){
clearTimeout(startani)
oPopup.hide()
}

function dowhat(){
if (imageclick=="dismiss")
dismisspopup()
else
window.location=imageclick
}


if(isie) {
  var x=0,y=0,dx=speed,dy=speed;
  var oPopup = window.createPopup();
  var oPopupBody = oPopup.document.body;
  oPopupBody.style.cursor="hand"
  oPopupBody.innerHTML = '<IMG SRC="'+preloadit.src+'">';
  oPopup.document.body.onmouseover=new Function("clearTimeout(startani)")
  oPopup.document.body.onmouseout=pop
  oPopup.document.body.onclick=dowhat
  pop();

if (hideafter>0)
setTimeout("dismisspopup()",hideafter*1000)
}


// -->
</SCRIPT>
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