/*图片自适应大小*/

function DrawImage(ImgD,imgw,imgh){ 
 var image=new Image(); 
 image.src=ImgD.src; 
 if(image.width>0 && image.height>0){ 

  if(image.width/image.height>= imgw/imgh){ 
   if(image.width>imgw){
    ImgD.width=imgw; 
    ImgD.height=(image.height*imgw)/image.width; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看详细信息..."; 
  } 
  else{ 
   if(image.height>imgh){
    ImgD.height=imgh; 
    ImgD.width=(image.width*imgh)/image.height; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看详细信息..."; 
  } 
 }
}

function DrawImageH(ImgD,imgh){ /*同高*/
 var image=new Image(); 
 image.src=ImgD.src; 
 if(image.width>0 && image.height>0){ 
  flag=true;  
   if(image.height>imgh){
    ImgD.height=imgh; 
    ImgD.width=(image.width*imgh)/image.height; 
   }else{ 
    ImgD.width=image.width;
    ImgD.height=image.height; 
   } 
   ImgD.alt="点击查看详细信息..."; 
  } 

}