String.prototype.stripslashes = function(){ 
    return this.replace(/<.*?>/g, '');
};
 
String.prototype.htmlspecialchars = function(){ 
    var str = this.replace(/&/g, '&');
    str = str.replace(/</g, '<');
    str = str.replace(/>/g, '>');
    str = str.replace(/"/g, '"');
    return str;
};

//使用范例：
var str = '<b>my personal website:</b> ';
str += '<a href="http://www.jonasjohn.de/">jonasjohn.de</a>';
 
document.write("Original string (html): '" + str + "'<br/><br/>");
 
var str_no_html = str.stripslashes();
document.write("- String without HTML tags: '" + str_no_html + "'<br/>");
 
var str_hsc = str.htmlspecialchars();
document.write("- String with converted HTML tags: '" + str_hsc + "'");
//javascript/2098