string-plus.js

String.prototype.withoutAccent = function(){
    var accent = [
        /[\300-\306]/g, /[\340-\346]/g, // A, a
        /[\310-\313]/g, /[\350-\353]/g, // E, e
        /[\314-\317]/g, /[\354-\357]/g, // I, i
        /[\322-\330]/g, /[\362-\370]/g, // O, o
        /[\331-\334]/g, /[\371-\374]/g, // U, u
        /[\321]/g, /[\361]/g, 			// N, n
        /[\307]/g, /[\347]/g, 			// C, c
    ];
    var noaccent = ['A','a','E','e','I','i','O','o','U','u','N','n','C','c'];
     
    var str = this;
    for(var i = 0; i < accent.length; i++){
        str = str.replace(accent[i], noaccent[i]);
    }
     
    return str;
}

String.prototype.without = function (pString){
    var str = this;
    return str.replace(pString, "");
}

String.prototype.clean = function (){
    var str = this;
    var strip_LineFeed =/(?:\r\n|\r|\n|\t){2,}/g;
    return str.replace(strip_LineFeed,"").replace('  ', ' ');
}

String.prototype.isNumber = function (){
    var str = this;
    return !isNaN(str);
}