/*
function addEvent(evt, condition, action) {
	a = this.event[evt].length;
	this.event[evt][a][0] = condition;
	this.event[evt][a][1] = action;
	return a;
}

//function removeEvent(evt, 
*/

function DOMExtension () {

	function addClassName(className) {
		
		var exp = new Array();
		var add = true;
		exp[0] = new RegExp("^" + className + " ", 'g');
		exp[1] = new RegExp("^" + className + "$", 'g');
		exp[2] = new RegExp(" " + className + "$", 'g');
		exp[3] = new RegExp(" " + className + " ", 'g');
		
		for (var i = 0; i < exp.length; i++) {
			if (exp[i].test(this.className)) add = false;
		}
		if (add) this.className += ' ' + className;
	}
	
	function removeClassName(className) {
		
		var exp = new Array();
		var switchto = new Array();
		exp[0] = new RegExp("^" + className + " ", 'g');
		exp[1] = new RegExp("^" + className + "$", 'g');
		exp[2] = new RegExp(" " + className + "$", 'g');
		exp[3] = new RegExp(" " + className + " ", 'g');
		switchto[0] = '';
		switchto[1] = '';
		switchto[2] = '';
		switchto[3] = ' ';
		for (var i = 0; i < exp.length; i++) {
			if (exp[i].test(this.className)) {
				this.className = this.className.replace(exp[i], switchto[i]);
			}
		}
	}
	
	
	
	function getElementsByClassName(className) {
		
		var exp = new Array();
		var add = false;
		exp[0] = new RegExp("^" + className + " ", 'g');
		exp[1] = new RegExp("^" + className + "$", 'g');
		exp[2] = new RegExp(" " + className + "$", 'g');
		exp[3] = new RegExp(" " + className + " ", 'g');
		var a = this.getElementsByTagName('*');
		var b = new Array();
		for(var i = 0; i < a.length; i++) {
			add = false;
			for (var j = 0; j < exp.length; j++) {
				if (exp[j].test(a[i].className)) add = true;
			}
			if (add) b[b.length] = a[i];
		}
		return b;
	}
	
	
	function getElementsByClassNameI(className) {
		
		var exp = new Array();
		var add = false;
		exp[0] = new RegExp("^" + className + " ", 'g');
		exp[1] = new RegExp("^" + className + "$", 'g');
		exp[2] = new RegExp(" " + className + "$", 'g');
		exp[3] = new RegExp(" " + className + " ", 'g');
		var a = this.getElementsByTagName('*');
		var b = new Array();
		for(var i = 0; i < a.length; i++) {
			add = false;
			for (var j = 0; j < exp.length; j++) {
				if (exp[j].test(a[i].className)) add = true;
			}
			if (add) b[b.length] = a[i];
		}
		return b;
	}
	
	function hasClassName(className) {
		
		var exp = new Array();
		var has = false;
		exp[0] = new RegExp("^" + className + " ", 'g');
		exp[1] = new RegExp("^" + className + "$", 'g');
		exp[2] = new RegExp(" " + className + "$", 'g');
		exp[3] = new RegExp(" " + className + " ", 'g');
		
		for (var i = 0; i < exp.length; i++) {
			if (exp[i].test(this.className)) has = true;
		}
		return has;
	}
	
	function hasClassNameI(className) {
	
		var exp = new Array();
		var has = array();;
		
		className = className.split(' ');
		
		for (var j in className) {
			
			exp[0] = new RegExp("^" + className[i] + " ", 'g');
			exp[1] = new RegExp("^" + className[i] + "$", 'g');
			exp[2] = new RegExp(" " + className[i] + "$", 'g');
			exp[3] = new RegExp(" " + className[i] + " ", 'g');
			for (var i = 0; i < exp.length; i++) {
				if (exp[i].test(this.className)) has[j] = true;
			}
		}
		var tot = true;
		for (var i in has) tot = tot && has;
		return tot;
	}
	
		
	function getChildElementsByTagName(tagName) {
		var b = new Array();
		var at = this.getElementsByTagName('li');
		for(var i = 0; i < at.length; i++) {
			if( at[i].parentNode == this ) b[b.length] = at[i];
		}
		return b;
	}
	
	
	function prependChild ( newNode ) {
		
		if ( this.childNodes.length )
			return this.insertBefore(newNode, this.childNodes[0]);
		
		else return this.appendChild(newNode);
		
	}
	
	
	function insertAfter(newNode, node) {
		if (node.nextSibling) return this.insertBefore(newNode, node.nextSibling);
		else return this.appendChild(newNode);
	}
	
	document.getElementsByClassName = getElementsByClassName;
	document.getElementsByClassNameI = getElementsByClassNameI;
	
	
	/*document..getElementsByClassName = getElementsByClassName;
	document.body.addClassName = addClassName;
	document.body.hasClassName = hasClassName;
	document.body.hasClassNameI = hasClassNameI;
	document.body.removeClassName = removeClassName;
	document.body.getChildElementsByTagName = getChildElementsByTagName;
	document.body.insertAfter = insertAfter;*/
	
	HTMLElement.prototype.getElementsByClassName = getElementsByClassName;
	HTMLElement.prototype.addClassName = addClassName;
	HTMLElement.prototype.hasClassName = hasClassName;
	HTMLElement.prototype.hasClassNameI = hasClassNameI;
	HTMLElement.prototype.removeClassName = removeClassName;
	HTMLElement.prototype.getChildElementsByTagName = getChildElementsByTagName;
	HTMLElement.prototype.insertAfter = insertAfter;
	HTMLElement.prototype.prependChild = prependChild;
}