1.鼠标滚动图片大小调整
<body>
<script LANGUAGE=”JAVASCRIPT”>
function bbimgo){
var zoom=parseInto.style.zoom, 10)||100;
zoom+=event.wheelDelta/12;
if zoom>0)
o.style.zoom=zoom+’%’;
return false;
}
</script>
<img src=”123.jpg” onload=”javascript:ifthis.width>screen.width-screen.width/2) this.style.width=screen.width-screen.width/2″ onmousewheel=”return bbimgthis)” >
</body>
2.图片自动缩小到固定大小
<body onload=”DrawImagetheimg)”>
<script language=”JavaScript”>
<!–
//图片按比例缩放
var flag=false;
function DrawImageImgD){
var image=new Image);
var iwidth = 320; //定义允许图片宽度
var iheight = 180; //定义允许图片高度
image.src=ImgD.src;
ifimage.width>0 && image.height>0){
flag=true;
ifimage.width/image.height>= iwidth/iheight){
ifimage.width>iwidth){
ImgD.width=iwidth;
ImgD.height=image.height*iwidth)/image.width;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt=image.width+”×”+image.height;
}
else{
ifimage.height>iheight){
ImgD.height=iheight;
ImgD.width=image.width*iheight)/image.height;
}else{
ImgD.width=image.width;
ImgD.height=image.height;
}
ImgD.alt=image.width+”×”+image.height;
}
}
}
//–>
</script>
<img src=”123.jpg” width=”1024″ height=”768″ name=”theimg”>
</body>
3.滚轮图片缩放的代码
<script language=”javascript”>
var count = 10;
function resizeimgoImage)
{
count = Countingcount);
ResizeoImage,count);
return false;
}
function Countingnewzoom){
if event.wheelDelta >= 120)
newzoom++;
else if event.wheelDelta <= -120)
newzoom–;
if newzoom<2) newzoom=2; ////只允许缩小到20%
if newzoom>50) newzoom=50; ////只允许放大到500%
return newzoom;
}
function ResizeoImage,newzoom){
oImage.style.zoom = newzoom + ‘0%’;
count=newzoom;
}
</script>
然后在<img src=””>中加入
onDblClick=”return Resizethis,10);return false;”
onmousewheel=”return resizeimgthis)”
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