//trim completo
	String.prototype.trim = function () {
		return this.replace(/^\s+|\s+$/g,"");
	}

	//left trim
	String.prototype.ltrim = function () {
		return this.replace(/^\s+/,"");
	}

	//right trim
	String.prototype.rtrim = function () {
		return this.replace(/\s+$/,"");
	}