function changeTab(tab, menu) {
	
	var tabs  = Array();
	var count = 0;
	var current_element = document.getElementById(tab);
	
	tabs[0] = "forum";
	tabs[1] = "blogs";
	tabs[2] = "news";
	tabs[3] = "wiki";
	
	for (count = 0; count < tabs.length; count++) {
		var element      = document.getElementById(tabs[count]);
		var menu_element = document.getElementById(tabs[count] + "_menu");
		
		if (element.id != current_element.id)
		{
			element.className = "hideTab";
			menu_element.className = "";
		}
		else
		{
			element.className = "showTab";
			menu_element.className = "active";
		}
	}
}