function setnum(my,sw,sh)
{
    var maxHeight = sh;
    var maxWith = sw;
  
   // alert(my.offsetHeight);
   
        var h = my.offsetHeight;
        var w = my.offsetWidth;
       
          
        while(h>maxHeight || w>maxWith)
        {
            h*=0.9;
            w*=0.9;
           
        }
        
        
       my.style.height=Math.ceil(h)+"px";
        my.style.width=Math.ceil(w)+"px";
        my.style.visibility="visible";
      
   
}