var flag=false;
function DrawImage(ImgD,wid,hei){
   var image=new Image();
   image.src=ImgD.src;
   if(image.width>0 && image.height>0){
    flag=true;
    if(image.width/image.height>= wid/hei){
     if(image.width>wid){
     	ImgD.width=wid;
     	ImgD.height=(image.height*wid)/image.width;
     }else{
     	ImgD.width=image.width;
     	ImgD.height=image.height;
     }
     }
    else{
     if(image.height>hei){
     	ImgD.height=hei;
     	ImgD.width=(image.width*hei)/image.height;
     }else{
     	ImgD.width=image.width;
     	ImgD.height=image.height;
     }
     }
    }

  }