versOk = (((navigator.appName == "Netscape")&& 
            (parseInt(navigator.appVersion) >= 3)) ||
        
           ((navigator.appName == "Microsoft Internet Explorer")&&
            (parseInt(navigator.appVersion)>=4))
          );




function rollOn(n)
{

		   light=eval(n+"2.src");
	       if (document [n].src == light) img=true;
		   else 
		   		{
				img=false;
           		document [n].src=light;
				}

}

function rollOff(n)
{

           if (!img)
		   	  {
			  dark=eval(n+"1.src");
              document [n].src=dark;
			  }
}



var okienko= null;

function okno(link,x,y)
{

if (!x) var x=450;
if (!y) var y=450;

//alert (y);

//	if (!okienko || okienko.closed)
//		{
		okienko=window.open(link,'zoom','directories=no, location=no, menubar=no, scrollbars=no, status=no, toolbar=no, resizable=1, left='+((screen.width)/2-300)+', top='+((screen.height)/2-300)+', width=' + x + ', height=' + y);
//		}
	okienko.focus();
}