var last_clicked = null;

	function check_menu_over(image_id){
		re=new RegExp('_01.html','gi');
		image_id.src=image_id.src.replace(re,"_02.html");
	}

	function check_menu_out(image_id){
		re=new RegExp('_02.html','gi');
		image_id.src=image_id.src.replace(re,"_01.html");
	}
	
	function show_submenu_div(div_id){

		if(document.getElementById(div_id).style.display=='block'){
			document.getElementById(div_id).style.display='none';
		} else {
			document.getElementById(div_id).style.display='block';
		}
	}
	
	function openWin( windowURL, windowName, windowFeatures ) { 
		return window.open( windowURL, windowName, windowFeatures ) ; 
	}