function $(){
	if(arguments.length == 0){
		return false;
	}else if(arguments.length == 1){
		return _$(arguments[0]);
	}else{
		var arr = [];
		for(var i = 0; i < arguments.length; i++){
			var node = _$(arguments[i]);
			if(node){
				arr.push(node);
			}
		}
		if(arr.length){
			return arr;
		}else{
			return false;	
		}
	}
}
function _$(arg){
	if(typeof arg == "string"){
		return document.getElementById(arg);
	}else if(typeof arg == "object" && typeof arg.nodeType != "undefined"){
		return arg;
	}else{
		return false;
	}
}
function $T(tName, parent){
	parent = parent ? parent : document;
	return parent.getElementsByTagName(tName);
}

function $F(ipt){
	ipt = $(ipt);
	var node_names = ["SELECT", "INPUT", "TEXTAREA"];
	var node_name = "";
	var types = [];
	var ret = true;
	for(var i = 0; i < node_names.length; i++){
		if(ipt.nodeName == node_names[i]){
			node_name = node_names[i];
		}
	}
	if(!node_name)
		return;

	return $F[node_name.toLowerCase()](ipt);
}
$F.select = function(objSel){
	if(!!objSel.value){
		return objSel.value;
	}else{
		var ops = $T("OPTION", objSel);
		return ops[objSel.selectedIndex].innerText;
	}
};
$F.textarea = function(objTArea){
	return objTArea.value;
};
$F.input = function(objIpt){
	return objIpt.value;
};
function $C(className, parent){
	parent = (parent) ? parent : document;
	className = new RegExp('^' + className + '$');
	var arr = [];
	var collection = $T("*", parent);
	for(var i = 0; i < collection.length; i++){
		var classes = collection[i].className.split(" ");
		for(var j = 0; j < classes.length; j++){
			if(classes[j].match(className)){
				arr.push(collection[i]);
				continue;
			}
		}
	}
	if(arr.length != 0){
		return arr;
	}else{
		return false;
	}
}
function $S(cssSelector){
	var arr = cssSelector.split(" ");
	for(var i = 0; i < arr.length; i++){
		var type = "_tag";
		if(arr[i].charAt(0) == "."){
			type = "_class";
		}else if(arr[i].charAt(0) == "#"){
			type = "_id";
		}
		$S[type](arr[i]);
	}
}
$S._tag = function(){};
$S._class = function(){};
$S._id = function(){};


Function.prototype.bind = function(){
	var _method = this;
	var _object = arguments[0];
	var _args = [];
	for(var i = 1; i < arguments.length; i++){
		_args.push(arguments[i]);
	}
	return function(){
		return _method.apply(_object, _args);
	}	
}
Array.prototype.each = function(iterator){
	for(var i = 0; i < this.length; i++){
		iterator(this[i], i);
	}
}