var jsUtils =
{
	arEvents: Array(),

	addEvent: function(el, evname, func, capture)
	{
		if(el.attachEvent) // IE
			el.attachEvent("on" + evname, func);
		else if(el.addEventListener) // Gecko / W3C
			el.addEventListener(evname, func, false);
		else
			el["on" + evname] = func;
		this.arEvents[this.arEvents.length] = {'element': el, 'event': evname, 'fn': func};
	},
	
	FindChildObject: function(obj, tag_name, class_name)
	{
		if(!obj)
			return null;
		var tag = tag_name.toUpperCase();
		var cl = (class_name? class_name.toLowerCase() : null);
		var n = obj.childNodes.length;
		for(var j=0; j<n; j++)
		{
			var child = obj.childNodes[j];
			if(child.tagName && child.tagName.toUpperCase() == tag)
				if(!class_name || child.className.toLowerCase() == cl)
					return child;
		}
		return null;
	}
}


/************************************************/

function TabControl(name, unique_name, aTabs)
{
	var _this = this;
	this.name = name;
	this.unique_name = unique_name;
	this.aTabs = aTabs;
	this.aTabsDisabled = {};
	this.bExpandTabs = false;

	this.SelectTab = function(tab_id)
	{
		var div = document.getElementById(tab_id);
		if(div.style.visibility != 'hidden')
			return;

		for(var i in this.aTabs)
		{
			var tab = document.getElementById(this.aTabs[i]["DIV"])
			if(tab.style.visibility != 'hidden')
			{
				this.ShowTab(this.aTabs[i]["DIV"], false);
				tab.style.visibility = 'hidden';
				break;
			}
		}

		this.ShowTab(tab_id, true);
		div.style.visibility = 'visible';

		//document.getElementById(this.name+'_active_tab').value = tab_id;

		for(var i in this.aTabs)
			if(this.aTabs[i]["DIV"] == tab_id)
			{ 
				this.aTabs[i]["_ACTIVE"] = true;
				if(this.aTabs[i]["ONSELECT"])
					eval(this.aTabs[i]["ONSELECT"]);
				break;
			}
	}

	this.ShowTab = function(tab_id, on)
	{
		var sel = (on? '-selected':'');
		document.getElementById('tab_cont_'+tab_id).className = 'tab-container'+sel;
		document.getElementById('tab_'+tab_id).className = 'tab'+sel;
	}

	this.HoverTab = function(tab_id, on)
	{
		var tab = document.getElementById('tab_'+tab_id);
		if(tab.className == 'tab-selected')
			return;

		tab.className = (on? 'tab-hover':'tab');
	}

	this.InitEditTables = function()
	{
		for(var tab in this.aTabs)
		{
			var div = document.getElementById(this.aTabs[tab]["DIV"]);
			var tbl = jsUtils.FindChildObject(div, 'table', 'edit-table');
			if(!tbl)
				continue;

			var n = tbl.rows.length;
			for(var i=0; i<n; i++)
				if(tbl.rows[i].cells.length > 1)
					tbl.rows[i].cells[0].className = 'field-name';
		}
	}

	this.Destroy = function()
	{
		for(var i in this.aTabs)
		{
			var tab = document.getElementById('tab_cont_'+this.aTabs[i]["DIV"]);
			if (!tab)
				continue;
			tab.onclick = null;
			tab.onmouseover = null;
			tab.onmouseout = null;
		}
		_this = null;
	}
}
/************************************************/