function findDiv(n, d) 
{ 
	var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) 
	{
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);
	}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findDiv(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function toggleNav() 
{ 
  var i,p,v,obj,args=toggleNav.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=findDiv(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v='hide')?'hidden':v; }
    obj.visibility=v; }
}

function hideAllDDs() 
{
	toggleNav('m_info','','hide');
	toggleNav('abitur','','hide');
	toggleNav('ucheba','','hide');
	toggleNav('nauka','','hide');
	toggleNav('dist_ob','','hide');
	toggleNav('svobodnVr','','hide');
}

function hideDD(sect) 
{
	toggleNav(sect,'','hide');
	hideAllDDs();
}

var sectionSetting = null;
function setDDactive(sect) 
{
	toggleNav(sect,'','show');
	if (sectionSetting != null) 
	{
		window.clearTimeout(sectionSetting);
	}
}

function setDDTimeout(sect) 
{
	if (sectionSetting != null) 
	{
		window.clearTimeout(sectionSetting);
	}
	sectionSetting = window.setTimeout('hideDD("' + sect + '")',700);
}