// JavaScript Document
var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;

window.onload = function(){
	var menu = document.getElementById("menu");
	var buttons = menu.getElementsByTagName("a");
	if(buttons){
		for(var i=0; i<buttons.length; i++){
			var button = buttons[i];
			if(button.id != ""){
				button.onmouseover = mopen;
				button.onmouseout = mclosetime;
			}
		}
	}
	var sub_buttons = menu.getElementsByTagName("div");
	if(sub_buttons){
		for(var i=0; i<sub_buttons.length; i++){
			var sub_button = sub_buttons[i];
			if(sub_button.id.match("s")){
				sub_button.onmouseover = mcancelclosetime;
				sub_button.onmouseout = mclosetime;
			}
		}
	}

	var sub_but_conts =  menu.getElementsByTagName("div");
	if(sub_but_conts){
		for(var i=0; i<sub_but_conts.length; i++){
			var cont = sub_but_conts[i];
			if(cont.className == "sub_button"){
				cont.onmouseover = overtable;
				cont.onmouseout = outtable;
			}
		}
	}
}
function overtable(event){this.className = "sub_mouse_over";}
function outtable(event){this.className = "sub_button";}

// open hidden layer
function mopen(event)
{	
	id = "s"+this.id;

// cancel close timer
	mcancelclosetime();

	// close old layer
	if(ddmenuitem) ddmenuitem.style.display = 'none';

	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	if(ddmenuitem) ddmenuitem.style.display = 'block';
}

// close showed layer
function mclose(){
	if(ddmenuitem) ddmenuitem.style.display = 'none';
}

// go close timer
function mclosetime(event){
	closetimer = window.setTimeout(mclose, timeout);
}

// cancel close timer
function mcancelclosetime(event){
	
	if(closetimer)
	{
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

// close layer when click-out
document.onclick = mclose; 

function emptyField(textObj){
	if (textObj.value.length == 0) return true;
	for (var i=0; i<textObj.value.length; i++) {
		var ch = textObj.value.charAt(i);
		if (ch != ' ' && ch != '\t') return false;	
	}
	return true;	
}

function checkSearch(){
	var text = document.getElementById("search_text");
	return !emptyField(text);
}

function openComment(comment_id){
	document.getElementById("s_comment_"+comment_id).style.display = (document.getElementById("s_comment_"+comment_id).style.display == 'block') ? 'none' : 'block';
	document.getElementById("comment_"+comment_id).style.display = (document.getElementById("comment_"+comment_id).style.display == 'block') ? 'none' : 'block';
}