Utilities = {};


Utilities.createElement = function() {}


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.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 = Utils.ge(id).style;
	object.opacity = (opacity/100);
	object.MozOpacity = (opacity/100);
	object.KhtmlOpacity = (opacity/100);
	object.filter = "alpha(opacity=" + opacity + ")";
}