var flag=false;
function DrawImage(ImgD,imgWidth,imgHeight){
    var image=new Image();
    image.src=ImgD.src;
    if(image.width>0 && image.height>0){
        flag=true;
        if(image.width/image.height>=imgWidth/imgHeight){
            if(image.width>imgWidth){
                ImgD.width=imgWidth;
                ImgD.height=(image.height*imgWidth)/image.width;
            }else{
                ImgD.width=image.width;
                ImgD.height=image.height;
            }
            //ImgD.alt=image.width+"×"+image.height;
        }else{
            if(image.height>imgHeight){
                ImgD.height=imgHeight;
                ImgD.width=(image.width*imgHeight)/image.height;
            }else{
                ImgD.width=image.width;
                ImgD.height=image.height;
            }
            //ImgD.alt=image.width+"×"+image.height;
        }
    }
}