function getQueryVariable(variable)
{
	var query = window.location.search.substring(1);
	var vars = query.split("&");
	for (var i=0; i < vars.length; i++) 
	{
		var pair = vars[i].split("=");
   		if (pair[0] == variable)
		{
     		return pair[1];
		}
	}
	
  	// alert(variable + ' not found');	
}

function checkQuery()
{
	
	var page = getQueryVariable("p");
	var navcols = 3;
	
	if (document.getElementById)
	{
		for (i = 1; i <= navcols; i++)
		{
			var thisnavtdid = "nav" + i;
			var thisnavdiv = document.getElementById(thisnavtdid);
			
			var imgs = thisnavdiv.getElementsByTagName("img");
			for (var j = 0; j < imgs.length; j++)
			{ 
				var thisid = imgs[j].getAttribute("id");
				if (thisid == page)
				{
					imgs[j].style.visibility = "visible";
				}
			}
			
			var as = thisnavdiv.getElementsByTagName("a"); 
			for (var k = 0; k < as.length; k++)
			{ 
				var thisid = as[k].getAttribute("id");
				if (thisid == "t_" + page)
				{
					as[k].style.fontWeight = "bold";
				}				
			}
			
		}
	}
	
	
	return false;
	
}

window.onload = checkQuery;