//@06.07.18
//main programe
function show(action,channel_num,start_index,root_length){
	for(var n=start_index;n<root_length;n++){
		document.getElementById('root'+n).style.display = 'block';
		try{document.getElementById('sub'+n).style.display = 'none';}
		catch(e){}
	}
           if (action=='open'){
	   	      document.getElementById('root'+channel_num).style.display = 'none';
			  document.getElementById('sub'+channel_num).style.display = 'block';
		   }
		   else{
    		  document.getElementById('sub'+channel_num).style.display = 'none';
   		      document.getElementById('root'+channel_num).style.display = 'block';
		   }
}
//add channel for data
//参数opened 是否展开栏目
function add_channel(name, url, opened) {
	        this.opened = (opened==true) ? true : false;
            this.name = name;
            this.url = url;
			this.sub_channel = new Array();
}

//when onmouseover, then change_class this background( just class name)	
function change_class(object,class_name){
  object.className=class_name;
}
//show 栏目
//参数 start_index 根目录开始索引数值 
//参数 root_length 根目录数组长度 
function show_menu(start_index,root_length)
{    	 
			<!--menu star-->
			document.write('<div class="menu">');
		   	for (var i=start_index;i<root_length;i++){
		    if (root[i].sub_channel.length!=0)
		    {
		    document.write('<div id="root'+i+'" class="root_close_onmouseout" onmouseover="change_class(this,\'root_close_onmouseover\')" onmouseout="change_class(this,\'root_close_onmouseout\')"');
			if ( root[i].opened==true ) {document.write('style="display:none;"');}
			document.write('><a href="javascript:show(\'open\','+i+','+start_index+','+root_length+');" title="'+openTitle+'"  target="_self"><div class="root_array"></div></a><a href="'+root[i].url+'" target="'+target+'" title="'+goTitle+'"><div class="root_text">'+root[i].name+'</div></a></div>');
			document.write('<div id="sub'+i+'" class="sub"');
			if ( root[i].opened==true ) {document.write('style="display:block;"');}
			document.write('>');
			document.write('<div class="root_open_onmouseout" onmouseover="change_class(this,\'root_open_onmouseover\')" onmouseout="change_class(this,\'root_open_onmouseout\')"><a href="javascript:show(\'close\','+i+','+start_index+','+root_length+');" title="'+closeTitle+'"  target="_self"><div class="root_array"></div></a><a href="'+root[i].url+'" target="'+target+'" title="'+goTitle+'"><div class="root_text">'+root[i].name+'</div></a></div>');
		
			<!--子栏目-->
			for (var j=0;j<root[i].sub_channel.length-1;j++){
			   document.write('<a href="'+root[i].sub_channel[j].url+'" target="'+target+'" title="'+goTitle+'" class="sub_link"><div class="sub_inner_onmouseout" onmouseover="change_class(this,\'sub_inner_onmouseover\')" onmouseout="change_class(this,\'sub_inner_onmouseout\')">'+root[i].sub_channel[j].name+'</div></a>');			   
			}
			document.write('<a href="'+root[i].sub_channel[root[i].sub_channel.length-1].url+'" target="'+target+'" title="'+goTitle+'" class="sub_link"><div class="sub_inner_lastOne_onmouseout"  onmouseover="change_class(this,\'sub_inner_lastOne_onmouseover\')" onmouseout="change_class(this,\'sub_inner_lastOne_onmouseout\')">'+root[i].sub_channel[root[i].sub_channel.length-1].name+'</div></a>');			    
			document.write('</div>');
			}
			else{
				 document.write('<div id="root'+i+'" class="root_close_onmouseout" onmouseover="change_class(this,\'root_close_onmouseover\')" onmouseout="change_class(this,\'root_close_onmouseout\')"><div class="root_array"></div><a href="'+root[i].url+'"  target="'+target+'" title="'+goTitle+'"><div class="root_text">'+root[i].name+'</div></a></div>');
				 document.write('<div id="sub'+i+'" class="sub" style="display:none;">');
				 document.write('<div class="root_open_onmouseout" onmouseover="change_class(this,\'root_open_onmouseover\')" onmouseout="change_class(this,\'root_open_onmouseout\')"><a href="javascript:show(\'close\','+i+','+start_index+','+root_length+');" title="'+closeTitle+'"  target="_self"><div class="root_array"></div></a><a href="'+root[i].url+'" target="'+target+'" title="'+goTitle+'"><div class="root_text">'+root[i].name+'</div></a></div>');
				 document.write('</div>');
				 
			}
		 }		 
		 document.write('</div>');
		 <!--menu结束-->
		  <!-- 间隔-->
   	     document.write('<div id="space"></div>');
}