不生成缩略图，直接调用原图
1 <head> 2 <title>测试</title> 3 <script language="javascript" type="text/javascript"> 4 //图片按比例缩放,可输入参数设定初始大小 5 function resizeimg(ImgD,iwidth,iheight) { 6 var image=new Image(); 7 image.src=ImgD.src; 8 if(image.width>0 && image.height>0){ 9 if(image.width/image.height>= iwidth/iheight){ 10 if(image.width>iwidth){ 11 ImgD.width=iwidth; 12 ImgD.height=(image.height*iwidth)/image.width; 13 }else{ 14 ImgD.width=image.width; 15 ImgD.height=image.height; 16 } 17 ImgD.alt=image.width+"×"+image.height; 18 } 19 else{ 20 if(image.height>iheight){ 21 ImgD.height=iheight; 22 ImgD.width=(image.width*iheight)/image.height; 23 }else{ 24 ImgD.width=image.width; 25 ImgD.height=image.height; 26 } 27 ImgD.alt=image.width+"×"+image.height; 28 } 29 ImgD.style.cursor= "pointer"; //改变鼠标指针 30 ImgD.onclick = function() { window.open(this.src);} //点击打开大图片 31 if (navigator.userAgent.toLowerCase().indexOf("ie") > -1) { //判断浏览器，如果是IE 32 ImgD.title = "请使用鼠标滚轮缩放图片，点击图片可在新窗口打开"; 33 ImgD.onmousewheel = function img_zoom() //滚轮缩放 34 { 35 var zoom = parseInt(this.style.zoom, 10) || 100; 36 zoom += event.wheelDelta / 12; 37 if (zoom> 0) this.style.zoom = zoom + "%"; 38 return false; 39 } 40 } else { //如果不是IE 41 ImgD.title = "点击图片可在新窗口打开"; 42 } 43 } 44 } 45 </script> 46 </head> 47 <body> 48 <br /><img onload="javascript:resizeimg(this,100,200)" src="http://img.poco.cn/photo/20060602/972374149620060602140117_1.jpg" /> 49 50 </body> 51 </html>