Utility for Array, String

Utility.js

String.prototype.replaceAll = function(search, replacement) {
    var target = this;
    return target.replace(new RegExp(search, 'g'), replacement);
};

Array.prototype.contains = function(v) {
    for(var i = 0; i < this.length; i++) {
        if(this[i] === v) return true;
    }
    return false;
};

Array.prototype.unique = function() {
    var arr = [];
    for(var i = 0; i < this.length; i++) {
        if(!arr.contains(this[i])) {
            arr.push(this[i]);
        }
    }
    return arr; 
}

function getQueryStrings()
{
    var vars = [], hash;
    var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
    for(var i = 0; i < hashes.length; i++)
    {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}

Array.prototype.removeByValue = function (val) {
    for (var i = 0; i < this.length; i++) {
        if (this[i] == val) {
            this.splice(i, 1);
            break;
        }
    }
}

String.prototype.contains = function (it) { return this.indexOf(it) != -1; };

$.fn.noSpecialChar = function () {
    (this).bind('keypress', function (event) {
        var regex = new RegExp("^[a-zA-Z0-9]+$");
        var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
        if (!regex.test(key)) {
            event.preventDefault();
            return false;
        }
    });
}

jQuery.fn.outerhtml = function() {
  return jQuery('<div />').append(this.eq(0).clone()).html();
};

$.fn.noSpecialChar = function () {
    (this).bind('keypress', function (event) {
        var regex = new RegExp("^[a-zA-Z0-9 ]+$");
        var key = String.fromCharCode(!event.charCode ? event.which : event.charCode);
        if (!regex.test(key)) {
            event.preventDefault();
            return false;
        }
    });
}