/*******************************************************************************
	AUTHOR:		Timothy Higgins
	CONTACT:	timothymichaelhiggins@gmail.com
*******************************************************************************/

	/***************************************************************************
		Swap navigation tab by hiding all elements with a name begining with
		"sec_" and "gate_" and show the appropriate elements.
	***************************************************************************/
	function openGate(id){

		//Hide all gates, sections, sub-menus.
		for(var i=0;i<document.getElementsByTagName("*").length;i++){
			if(document.getElementsByTagName("*")[i].id.indexOf("gate_")==0)
				document.getElementsByTagName("*")[i].className="";
			else if(document.getElementsByTagName("*")[i].id.indexOf("sec_")==0)
				document.getElementsByTagName("*")[i].className="hide";
			else if(document.getElementsByTagName("*")[i].id.indexOf("sub_")==0)
				document.getElementsByTagName("*")[i].className="hide";						
		}
		
		//Show the appropriate gate and section.
		if(document.getElementById("gate_"+id)!=null)
			document.getElementById("gate_"+id).className="s";
		if(document.getElementById("sec_"+id)!=null)
			document.getElementById("sec_"+id).className="sec";
	}
	
	/***************************************************************************
		Hide all sub-menus and show the appropriate menu.
	***************************************************************************/
	function openSub(id){
	
		//Hide all sub-menus.
		for(var i=0;i<document.getElementsByTagName("*").length;i++){
			if(document.getElementsByTagName("*")[i].id.indexOf("sub_")==0)
				document.getElementsByTagName("*")[i].className="hide";
		}
		
		//Show the appropriate sub-menus.
		if(document.getElementById("sub_"+id)!=null)
			document.getElementById("sub_"+id).className="sub";
	}