var  flag=false;  
function autoSize(ImgD,w,h)
{
	var  image=new  Image();  
     image.src=ImgD.src;  
     if(image.width>0  &&  image.height>0){  
       flag=true;  
       if(image.width/image.height>=  w/h){  
         if(image.width>w){      
         ImgD.width=w;  
         ImgD.height=(image.height*h)/image.width;  
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         }  
       else{  
         if(image.height>h){      
         ImgD.height=h;  
         ImgD.width=(image.width*w)/image.height;            
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         }  
       }  
}
function resizeimg(ImgD,iwidth,iheight) { 
var image=new Image(); 
image.src=ImgD.src; 
if(image.width>0 && image.height>0){ 
  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; 
	} 
	ImgD.alt=image.width+"×"+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; 
	} 
	ImgD.alt=image.width+"×"+image.height; 
  } 
  }
}