window.onload = init;

function init()
{
	setNavigationImages();
}

function setNavigationImages()
{
	var elements = document.getElementById("navigation").getElementsByTagName("img");
	
	for (i = 0; i < elements.length; i++)
	{
		elements[i].src = "images/square_" + (i % 2 == 0 ? "dark" : "light") + ".gif";
	}
}

function setTableRowBackgrounds()
{
	var args = colorBg.arguments;
	
	var d;
	
	var objTd;
	var objTr;
	
	var k;
	
	for (n = 0; n < args.length; n++)
	{
		obj = document.getElementById(args[n]);
		objTr = obj.getElementsByTagName("tr");
		k = 0;
		
		for (i = 0; i < objTr.length; i++)
		{
			if (objTr[i].className != "tr-head"
				&& objTr[i].parentNode.tagName != "THEAD"
				&& objTr[i].parentNode.tagName != "TFOOT")
			{
				if (k++ % 2 != 0)
				{
					objTd = objTr[i].getElementsByTagName("td");
					
					for (j = 0; j < objTd.length; j++)
					{
						objTd[j].style.backgroundColor = "rgb(245,245,245)";
						if (objTd[j].getElementsByTagName("img").length)
						{
							var src = objTd[j].getElementsByTagName("img")[0].src;
							var type = src.substring(src.lastIndexOf("."), src.length);
							objTd[j].getElementsByTagName("img")[0].src = src.substring(0, src.lastIndexOf(".")) + "_bg" + type;
						}
					}
				}
			}
		}
	}
}