//图片按比例缩放
var flag=false;
function DrawImage(ImgD,width,height)
{
var image=new Image();
var iwidth = width; //定义允许图片宽度
var iheight = height; //定义允许图片高度
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;
}
}
}
//调用：<img src="图片" onload="javascript:DrawImage(this,width,height)">
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