<html> <head> <title>emu</title> </head> <body> <BR> 原图:<BR> <img src=http://img.pconline.com.cn/images/photo2/839980/1118509777696.JPG onmousemove="zoom()" id=srcImg> <BR> 局部放大图:<BR> <div style="overflow:hidden"><img id=zoomImg></div> <SCRIPT LANGUAGE="JavaScript"> <!-- zoomImg.src = srcImg.src; srcImg.height = srcImg.height/2; var zoomRate = 5; zoomImg.height = srcImg.height*zoomRate; zoomImg.parentNode.style.width = srcImg.width; zoomImg.parentNode.style.height = srcImg.height; function zoom(){ var elm = event.srcElement; h = elm.offsetHeight/zoomRate/2; w = elm.offsetWidth/zoomRate/2; var x = event.x-elm.offsetLeft; x=x<(elm.offsetWidth-w)?x<w?w:x:elm.offsetWidth-w; zoomImg.style.marginLeft=(w-x)*zoomRate; var y = event.y-elm.offsetTop; y=y<(elm.offsetHeight-h)?y<h?h:y:elm.offsetHeight-h; zoomImg.style.marginTop=(h-y)*zoomRate; } //--> </SCRIPT> </body> </html>