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>=  250/250){  
         if(image.width>250){      
         ImgD.width=250;  
         ImgD.height=(image.height*250)/image.width;  
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt="实际图片大小为"+image.width+"×"+image.height;  
         }  
       else{  
         if(image.height>250){      
         ImgD.height=250;  
         ImgD.width=(image.width*250)/image.height;            
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt=image.width+"×"+image.height;  
         }  
       }  
} 
var  flag=false;  
function  DrawImagee(ImgD){  
     var  image=new  Image();  
     image.src=ImgD.src;  
     if(image.width>0  &&  image.height>0){  
       flag=true;  
       if(image.width/image.height>=  100/100){  
         if(image.width>100){      
         ImgD.width=100;  
         ImgD.height=(image.height*100)/image.width;  
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt="实际图片大小为"+image.width+"×"+image.height;  
         }  
       else{  
         if(image.height>100){      
         ImgD.height=100;  
         ImgD.width=(image.width*100)/image.height;            
         }else{  
         ImgD.width=image.width;      
         ImgD.height=image.height;  
         }  
         ImgD.alt=image.width+"×"+image.height;  
         }  
       }  
}