// JScript 文件
//图片按比例缩放 
    var flag=false; 
    function DrawImage(ImgD,imgw,imgh)
    { 
        var image=new Image(); 
        var iwidth = imgw; //定义允许图片宽度 
        var iheight = imgh; //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,宽,高)"> 
//-->