function control_img(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+"กม"+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+"กม"+image.height;
            }
กกกกกกกก
    }
}

function show(div_id)
 {
   document.getElementById(div_id).style.display="block";	 
 }
function hidden(div_id)
 {
   document.getElementById(div_id).style.display="none";	 
 } 
function hits(div_id)
{
   var obj=document.getElementById(div_id);
   if(obj.style.display=="none"){
	   obj.style.display="block";
	   }else{
	   obj.style.display="none";   
	   }
}