function ScaleImage(ImgD,w1,h1){
var flag=false;
var image=new Image();
image.src=ImgD.src;
if(image.width>0 && image.height>0){
   flag=true;
   if(image.width/image.height>= w1/h1){
      if(image.width>w1){ 
        ImgD.width=w1;
        ImgD.height=(image.height*w1)/image.width;
      }else{
        ImgD.width=image.width; 
        ImgD.height=image.height;
   }   
}
else{
      if(image.height>h1){ 
         ImgD.height=h1;
         ImgD.width=(image.width*h1)/image.height; 
      }else{
         ImgD.width=image.width; 
         ImgD.height=image.height;
      }     
  }
 }
}