function kep_mutat( id, src, width, height,w,h )
	{
		var kep = document.getElementById(id);
		//alert(src);
		
		
        if(width>height)
            {
                var ratio=height/width;
                //w=220;
                h=w*ratio;
            }
        else
            {
                var ratio=width/height;
                //h=220;
                w=h*ratio;
            }
        //alert(kep.width+'/'+kep.height+' '+ratio);
         if (src!='') kep.src=src;
        kep.width=w;
        kep.height=h;
      
        
       kep.style.visibility='visible';
	}
	
function kep_elrejt( id )
	{
		var kep = document.getElementById(id);
		kep.style.visibility='hidden';
        kep.src='';
	}