Trim any given character from a string

trim.js

String.prototype.trimChar = function (find) {
	var reg = new RegExp("^[" + find + "]+|[" + find + "]+$", "g");
	return this.replace(reg, '');
}

String.prototype.ltrimChar = function (find) {
	var reg = new RegExp("^[" + find + "]+", "g");
	return this.replace(reg, '');
}

String.prototype.rtrimChar = function (find) {
	var reg = new RegExp("[" + find + "]+$", "g");
	return this.replace(reg, '');
}