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