// JScript 文件

var flag=false; 
function DrawImage(ImgD,iwidth,iheight){ 
    //参数(图片,允许的宽度,允许的高度)
    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; 
            } 
        } 
        else{ 
            if(image.height>iheight){ 
                ImgD.height=iheight; 
                ImgD.width=(image.width*iheight)/image.height; 
            }else{ 
                ImgD.width=image.width; 
                ImgD.height=image.height; 
            } 
        } 
    } 
} 
function Init() {
    var obj=document.getElementsByTagName("img");
    for (var j=0; j < obj.length; j++) {
        DrawImage(obj[j],620,400);
    }
}