Utilities = {}

Utilities.includeJS = function(filepaths)
{
	for(var i=0; i<filepaths.length;i++)	
	{
		document.write('<script type="text/javascript" src="'+filepaths[i]+'"></script>');
	}
}

Utilities.includeCSS = function(filepaths)
{
	for(var i=0; i<filepaths.length;i++)	
	{
		document.write('<link href="'+filepaths[i]+'" rel="stylesheet" type="text/css" />');
	}
}

Utilities.getElement = function(i)
{
	return document.getElementById(i);
}

Utilities.debug = function(val)
{
	this.getElement('debug').innerHTML += val + "<br/>";
}

Utilities.toggle = function(id)
{
	this.getElement(id).style.display = (this.getElement(id).style.display=='')?'none':'';
}

Utilities.hide = function(id)
{
	this.getElement(id).style.display = 'none';
}

Utilities.show = function(id)
{
	this.getElement(id).style.display = '';
}

Utilities.createElement = function(e, obj)
{
	var element = document.createElement(e);
	for(prop in obj)
	{
		element[prop] = obj[prop];
	}
	return element;
}

Utilities.appendChild = function()
{
	if(this.appendChild.arguments.length>1)
	{
		var a = this.appendChild.arguments[0];
		for(i=1;i<this.appendChild.arguments.length;i++)
		{
			if(arguments[i])
			{
				a.appendChild(this.appendChild.arguments[i]);
			}
		}
		return a;
	}
	else
	{
		return null;
	}
}

Utilities.removeChildren = function(node)
{
	if(node==null)
	{
		return;
	}
	
	while(node.hasChildNodes())
	{
		node.removeChild(node.firstChild);
	}
}

Utilities.addListener = function(obj, eventName, listener)
{
	if(obj.attachEvent)
	{
		obj.attachEvent("on"+eventName, listener);
	}
	else if(obj.addEventListener)
	{
		obj.addEventListener(eventName, listener, false);
	}
	else
	{
		return false;
	}
	return true;
}

Utilities.removeListener = function(obj, eventName, listener)
{
	if(obj.detachEvent)
	{
		obj.detachEvent("on"+eventName, listener);
	}
	else if(obj.removeEventListener)
	{
		obj.removeEventListener(eventName, listener, false);
	}
	else
	{
		return false;
	}
	return true;
}

Utilities.changeOpac = function(opacity, id)
{
	var object = Utilities.getElement(id).style;
	object.opacity = (opacity/100);
	object.MozOpacity = (opacity/100);
	object.KhtmlOpacity = (opacity/100);
	object.filter = "alpha(opacity="+opacity+")";
}