function set_color(kat,id){
		img=document.getElementById(kat);
		img.src='/public/roofs_img/'+kat+'_'+id+'.jpg';
	}	
	
	function info(e,txt){
		if(e && txt){
			var  x=e.clientX+20+document.documentElement.scrollLeft;
			var  y=e.clientY+5+document.documentElement.scrollTop;
			document.getElementById('info').style.visibility='visible';
			document.getElementById('info').style.top=y+"px";
			document.getElementById('info').style.left=x+"px";
			document.getElementById('info').innerHTML = txt;
		} else {
			document.getElementById('info').style.visibility='hidden';
		}
	}