helper_prototype_methods.js

Node.prototype.addBefore = function(newElement) {
	this.parentNode.insertBefore(newElement,this);
}
Node.prototype.addAfter = function (newElement) {
	this.parentNode.insertBefore(newElement, this.nextSibling);
}
Node.prototype.setProperties = function(props){
	var i,p,c,k,j;
	for(i in props) {
		p = props[i];
		c = p.constructor;
		if(c === Object) {
			for(k in p) this[i][k] = p[k];
		} else if(c === Array) {
			for(j = 0, l = p.length; j < l; j++) this[i][j] = p[j];
		} else {
			this[i] = p;
		}
	}
}
Document.prototype.createElementProps = function(tagName, props){
	var element = this.createElement(tagName)
	element.setProperties(props);
	return element;
}

	var e = 'Event', e = window.addEventListener ? {a:'add'+(e+='Listener'),r:'remove'+e,p:''} : {a:'attach'+e,r:'detach'+e,p:'on'};
	Node.prototype.EVENT_ADD = e.a;
	Node.prototype.EVENT_REMOVE = e.r;
	Node.prototype.EVENT_PREFIX = e.p;
	e = null;

	Node.prototype.on =function(type, listener){
		on = this[this.EVENT_ADD];
		if(on){
			on(this.EVENT_PREFIX+type,listener);
		} else if(this['on'+type]){
			this['on' + type] = listener;
		}
	}
	Node.prototype.off =function(type, listener){
		var off = this[this.EVENT_REMOVE];
		if(off){
			off(this.EVENT_PREFIX+type,listener);
		} else if(this['on'+type]){
			this['on' + type] = null;
		}
	}
	Node.prototype.once = function(eventTarget, type, listener){
		this.on(type, var newlistener = function(){
			listener.call(this, type);
			this.off(type, newlistener);
		})
	}