js String 方法

String.prototype.Trim = function() {
        return this.replace(/(^\s*)|(\s*$)/g, "");
}
String.prototype.LTrim = function() {
        return this.replace(/(^\s*)/g, "");
}
String.prototype.RTrim = function() {
        return this.replace(/(\s*$)/g, "");
}
String.prototype.htmlEncode = function() {
        return this.replace(/&/g, "&amp;").replace(/>/g, "&gt;").replace(/</g,
                        "&lt;").replace(/"/g, "&quot;");
}
String.prototype.htmlDecode = function() {
        return this.replace(/&amp;/g, "&").replace(/&gt;/g, ">").replace(/&lt;/g,
                        "<").replace(/&quot;/g, '"');
}