/**
	 * 作者:李闯
	 * 功能:列有页左侧的导航条
	 */
	var nodes;
	
	var titles;
	
	var contexts;
	
	function load_left(){
	
		menu_ids = document.getElementsByName("menu_id");
		
		nodes = new Array(menu_ids.length);
		
		contexts = new Array(menu_ids.length);
		
		titles = new Array(menu_ids.length);
		
		var pid = "menu_" + document.getElementById("pid").value;
			
		for(var x=0;x<menu_ids.length;x+=1){
			
			titles[x] = "menu_" + menu_ids[x].value;
			
			nodes[x] = document.getElementById(titles[x]);
				
			contexts[x] = nodes[x].innerHTML;
			
			if(pid != titles[x]){
				nodes[x].innerHTML = "";	
			}
		}
	}
	
	function do_menu(title){
		
		for(var x=0;x<nodes.length;x+=1){
			
			if(titles[x] == title){
				
				if(nodes[x].innerHTML == ""){
					nodes[x].innerHTML = contexts[x];
				}else{
					nodes[x].innerHTML = "";	
				}
			}else{
				nodes[x].innerHTML = "";			
			}
		}
	}