图片按比例缩放
图片按比例缩放
js代码
<script language="JavaScript">
<!--
//图片按比例缩放
var flag=false;
function DrawImage(ImgD,iwidth,iheight){
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
flag=true;
if(image.width/image.height>= iwidth/iheight){
if(image.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{
if(image.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>
页面<body>中的代码
<img src="图片地址" border="0" onload="javascript:DrawImage(this,图片宽度,图片长度);" />
