var imgdir = "/LayoutImages/tabs/";
		
		var tab_elements = new Array();
		var old_groupid = new Array();
		var defaultTab = new Array();
		defaultTab['blokeen'] = 'blokeen-algemeen';
		defaultTab['bloktwee'] = 'bloktwee-algemeen';
		defaultTab['blokdrie'] = 'blokdrie-algemeen';
		
		function showTabContent(group, id)
		{
			var elementstyle, elementstylel, elementstyler;
		
			for (i in tab_elements[group])
				if (tab_elements[group][i] != id)
				{
					elementstyle = document.getElementById(tab_elements[group][i]).style;
					elementstylel = document.getElementById(tab_elements[group][i] + "-leftpic").style;
					elementstyler = document.getElementById(tab_elements[group][i] + "-rightpic").style;
		
					elementstyle.fontWeight = "normal";
					elementstyle.backgroundColor = "#ccddff";
					elementstylel.backgroundImage = "url(" + imgdir + "tab_left_normal.gif)";
					elementstyler.backgroundImage = "url(" + imgdir + "tab_right_normal.gif)";
		
					elementstylel.height = "14px";
					elementstyler.height = "14px";
					elementstyle.height = "14px";
				}
		
			elementstyle = document.getElementById(id).style;
			elementstylel = document.getElementById(id + "-leftpic").style;
			elementstyler = document.getElementById(id + "-rightpic").style;
		
			elementstyle.fontWeight = "bold";
			elementstyle.backgroundColor = "white";
			elementstylel.backgroundImage = "url(" + imgdir + "tab_left_highlight.gif)";
			elementstyler.backgroundImage = "url(" + imgdir + "tab_right_highlight.gif)";
		
			elementstyle.height = "15px";
			elementstylel.height = "15px";
			elementstyler.height = "15px";
			document.getElementById(group + "-content").innerHTML = document.getElementById(id + '-content').innerHTML;
			defaultTab[group] = id;
		}
		
		function setDefaultTabs()
		{
			var img = new Image();
			var i;
			var userinfo = "";
			for (i in defaultTab)
				userinfo += i + "_" + defaultTab[i] + ",";
			
		}