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

}
//onload="javascript:DrawImage(this,width,height);"