Email地址加密javascript版

function getEmail(email)
{
    var r = "";
    for (i=0;i<email.length;i++)
    {
        r += "&#" + email.charCodeAt(i);
    }
    return r;
}
效果如下：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>Email地址加密</title> 
<style type="text/css"> 
 
</style> 
<script language="javascript" type="text/javascript"> 
    function getEmail(email) 
    { 
        var r = ""; 
        for (i=0;i<email.length;i++) 
        { 
            r += "&#" + email.charCodeAt(i); 
        } 
        return r; 
    } 
     
     function setClipboard(id) 
    { 
        var tb = document.getElementById(id); 
        var copytext = tb.value; 
        if (copytext!="") 
        { 
            if (window.clipboardData) 
            { 
                window.clipboardData.setData("Text", copytext); 
                alert("已复制到剪贴板。"); 
            } 
            else if (window.netscape) 
            { 
                setClipboardNetscape(copytext); 
                alert("已复制到剪贴板。"); 
            } 
        } 
        return false; 
    } 
     
    function setClipboardNetscape(text){ 
        var url = [ 
            'data:text/html;charset=utf-8;base64,PGJvZHk+PC9ib2', 
            'R5PjxzY3JpcHQgdHlwZT0idGV4dC9qYXZhc2NyaXB0Ij4KKGZ1', 
            'bmN0aW9uKGVuY29kZWQpe3ZhciBzd2ZfZGF0YSA9IFsKICdkYX', 
            'RhOmFwcGxpY2F0aW9uL3gtc2hvY2t3YXZlLWZsYXNoO2Jhc2U2', 
            'NCxRMWRUQjJ3JywKICdBQUFCNG5EUGdZbGpBd01qSTRNejAlMk', 
            'YlMkY5JTJGZTJaZkJnYUdhV3dNRE1uNUthJywKICdrTU10TjRH', 
            'ZGdaZ1NJTXdaWEZKYW01UUFFJTJCQm9iaTFCTG5uTXlDcFB6RW', 
            '9oU0dJJywKICdQRnAlMkZBeHNEREJRa3BGWkRGUUZGQ2d1eVM4', 
            'QXlqSTRBRVVCaXkwVndBJTNEJTNEJwpdLmpvaW4oIiIpOwpkb2', 
            'N1bWVudC5ib2R5LmlubmVySFRNTCA9IFsKICc8ZW1iZWQgc3Jj', 
            'PSInLHN3Zl9kYXRhLCciICcsCiAnRmxhc2hWYXJzPSJjb2RlPS', 
            'csZW5jb2RlZCwnIj4nLAogJzwvZW1iZWQ+JwpdLmpvaW4oIiIp', 
            'Owp9KSgi', 
            base64encode( encodeURIComponent(text) + '")</'+'script>') 
        ].join(""); 
        var tmp = document.createElement("div"); 
        tmp.innerHTML = [ 
             '<iframe src="',url,'"' 
            ,' width="0" height="0">' 
            ,'</iframe>' 
        ].join(""); 
        with(tmp.style){ 
            position ="absolute"; 
            left = "-10px"; 
            top  = "-10px"; 
            visibility = "hidden"; 
        }; 
        document.body.appendChild(tmp); 
        setTimeout(function(){document.body.removeChild(tmp)},1000); 
        function base64encode(str){ 
            var Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split(""); 
            var c1, c2, c3; 
            var buf = []; 
            var len = str.length; 
            var i = 0; 
            while(i < len){ 
                c1 = str.charCodeAt(i) & 0xff; 
                c2 = str.charCodeAt(i+1); 
                c3 = str.charCodeAt(i+2); 
                buf.push(Chars[(c1 >> 2)]); 
                if(i+1 == len){ 
                    buf.push(Chars[(c1 & 0x3) << 4],"=="); 
                    break; 
                } 
                buf.push(Chars[((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4)]); 
                if(i+2 == len){ 
                    buf.push(Chars[(c2 & 0xF) << 2],"="); 
                    break; 
                } 
                buf.push( 
                    Chars[((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6)], 
                    Chars[(c3 & 0x3F)] 
                ); 
                i+=3; 
            } 
            return buf.join("") 
        } 
    } 
</script>     
</head>

<body> 
<p><strong>Email地址加密</strong></p> 
<p> 
  Email: 
    <input name="email" type="text" id="email" size="50" /> 
  <input type="button" name="Submit" value=" 加 密 " onclick="document.getElementById('export').value=getEmail(document.getElementById('email').value)"/> 
     
<input type="button" name="Submit2" value=" 验 证 " onclick="document.getElementById('preview').innerHTML=getEmail(document.getElementById('email').value)"/>  <span id="preview" style="color:#FF0000"></span > 
</p> 
<p> 
  结 果: 
    <input name="export" type="text" id="export" size="76" onclick="setClipboard(this.id)" onmouseover="javascript:this.select();" title="单击此处复制内容"/> 
</p> 
<p> 
   
</p> 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]