Array.prototype.indexOf || (Array.prototype.indexOf = function(value) {
      for (var i in this) {
          if (this[i] == value) {
              return i;
          }
      }
      return -1;
});
 
Array.prototype.remove = function(b) {
    var a = this.indexOf(b);
    if (a >= 0) {
        this.splice(a, 1);
        return true;
    }
    return false;
};
 
window.jlUtil = {
    getJSON: function(obj, skip_arr) {
        if (typeof obj == "number"
        || typeof obj == "boolean") {
            return obj;
        } else if (typeof obj == "string") {
            return "'" + obj.replace("'", "\\'") + "'";
        } else if (!obj) {
            return "''";
        }
        var json = [];
        skip_arr = skip_arr ? skip_arr : [];
        for (var key in obj) {
            //skip function and the keys in skip arr
            if (typeof obj[key] == "function"
            || skip_arr.indexOf(key) != -1) {
                continue;
            }
 
            //in Array loop
            if (!isNaN(key) || key.constructor != String) {
                json.push(jlUtil.getJSON(obj[key], skip_arr));
                continue;
            }
 
            //else recurrency
            json.push("'" + key + "':" + jlUtil.getJSON(obj[key], skip_arr));
        }
 
        if (Object.prototype.toString.apply(obj) === '[object Array]') {
            return "[" + json.join(",") + "]";
        } else {
            return "{" + json.join(",") + "}";
        }
    },
    extend: function(obj) {
        if (arguments.length == 1) {
            this.extend(this, obj);
            return this;
        } else if (arguments.length >= 2) {
            var dst = arguments[0];
            //extend the rest args to args[0]
            for (var i = 1; i < arguments.length; ++i) {
                for (var item in arguments[i]) {
                    var tmp = arguments[i][item];
                    if (typeof arguments[i][item] == "object") {
                        //make a copy while is a object, needs jQuery here
                        var tmp = $.extend({}, arguments[i][item]);
                    }
                    //if is object try recurrency
                    if (dst[item] && typeof dst[item] == "object") {
                        try {
                            this.extend(dst[item], tmp);
                        } catch (e) {
                            dst[item] = tmp;
                        }
                    } else {
                        dst[item] = tmp;
                    }
                }
            }
            return dst;
        }
    }
};

var jlUtil = {
	getJSON: function(obj, skip_arr){
		if(typeof obj == "number"
		|| typeof obj == "boolean"){
			return obj;
		}else if(typeof obj == "string"){
			return "'" + obj.replace("'","\\'") + "'";
		}
 
		var json = [];
		skip_arr = skip_arr ? skip_arr : [];
		for(var key in obj){
			//skip function and the keys in skip arr
			if(obj[key].constructor == Function
			|| skip_arr.indexOf(key) != -1){
				continue;
			}
 
			//in Array loop
			if(!isNaN(parseInt(key)) || key.constructor != String){
				json.push(jlUtil.getJSON(obj[key], skip_arr));
				continue;
			}
 
			//else recurrency
			json.push("'" + key + "':" + jlUtil.getJSON(obj[key], skip_arr));
		}
 
		if (obj.constructor == Array) {
			return "[" + json.join(",") + "]";
		} else {
			return "{" + json.join(",") + "}";
		}
	},
	extend: function(obj){
		if (arguments.length == 1) {
			this.extend(this, obj);
			return this;
		}else if(arguments.length >= 2){
			var dst = arguments[0];
			//extend the rest args to args[0]
			for(var i=1; i<arguments.length; ++i){
				for(var item in arguments[i]){
					var tmp = arguments[i][item];
					if(typeof arguments[i][item] == "object"){
						//make a copy while is a object, needs jQuery here
						var tmp = $.extend({}, arguments[i][item]);
					}
					//if is object try recurrency
					if(dst[item] && typeof dst[item] == "object"){
						try{
							this.extend(dst[item], tmp);
						}catch(e){
							dst[item] = tmp;
						}
					}else{
						dst[item] = tmp;
					}
				}
			}
			return dst;
		}
	}
};