顯示密碼的安全性提示

<div class="from-nav">
                        <div class="Mtitle"><span>密码:</span></div>
                        <div class="Mright"><input name="password" type="password" id="password" size="20" class="colorblue" onfocus="this.className='colorfocus';" onblur="this.className='colorblue';" onkeyup="return loadinputcontext(this);" /><span>不得少于6个字符</span>
                        </div>
    </div>
    <div class="from-nav">
                        <div class="Mtitle"><span>密码强度:</span></div>
                        <div class="Mright">
<script type="text/javascript">
        var PasswordStrength =...{
            Level : ["极佳","一般","较弱","太短"],
            LevelValue : [15,10,5,0],//强度值
            Factor : [1,2,5],//字符加数,分别为字母，数字，其它
            KindFactor : [0,0,10,20],//密码含几种组成的加数 
            Regex : [/[a-zA-Z]/g,/d/g,/[^a-zA-Z0-9]/g] //字符正则数字正则其它正则
            }
        PasswordStrength.StrengthValue = function(pwd)
        ...{
            var strengthValue = 0;
            var ComposedKind = 0;
            for(var i = 0 ; i < this.Regex.length;i++)
            ...{
                var chars = pwd.match(this.Regex[i]);
                if(chars != null)
                ...{
                    strengthValue += chars.length * this.Factor[i];
                    ComposedKind ++;
                }
            }
            strengthValue += this.KindFactor[ComposedKind];
            return strengthValue;
        } 
        PasswordStrength.StrengthLevel = function(pwd)
        ...{
            var value = this.StrengthValue(pwd);
            for(var i = 0 ; i < this.LevelValue.length ; i ++)
            ...{
                if(value >= this.LevelValue[i] )
                    return this.Level[i];
            }
        }
        function loadinputcontext(o)
        ...{
           var showmsg=PasswordStrength.StrengthLevel(o.value);
           switch(showmsg)
           ...{
              case "太短": showmsg+=" <img src='images/level/1.gif' width='88' height='11' />";break;
              case "较弱": showmsg+=" <img src='images/level/2.gif' width='88' height='11' />";break;
              case "一般": showmsg+=" <img src='images/level/3.gif' width='88' height='11' />";break;
              case "极佳": showmsg+=" <img src='images/level/4.gif' width='88' height='11' />";break;
           }
           document.getElementById('showmsg').innerHTML = showmsg;
        }
        function htmlEncode(source, display, tabs)
        ...{
            function special(source)
            ...{
                var result = '';
                for (var i = 0; i < source.length; i++)
                ...{
                    var c = source.charAt(i);
                    if (c < ' ' || c > '~')
                    ...{
                        c = '&#' + c.charCodeAt() + ';';
                    }
                    result += c;
                }
                return result;
            }
            function format(source)
            ...{
                // Use only integer part of tabs, and default to 4
                tabs = (tabs >= 0) ? Math.floor(tabs) : 4;
                // split along line breaks
                var lines = source.split(/ | | /);
                // expand tabs
                for (var i = 0; i < lines.length; i++)
                ...{
                    var line = lines[i];
                    var newLine = '';
                    for (var p = 0; p < line.length; p++)
                    ...{
                        var c = line.charAt(p);
                        if (c === ' ')
                        ...{
                            var spaces = tabs - (newLine.length % tabs);
                            for (var s = 0; s < spaces; s++)
                            ...{
                                newLine += ' ';
                            }
                        }
                        else
                        ...{
                            newLine += c;
                        }
                    }
                    // If a line starts or ends with a space, it evaporates in html
                    // unless it's an nbsp.
                    newLine = newLine.replace(/(^ )|( $)/g, '&nbsp;');
                    lines[i] = newLine;
                }
                // re-join lines
                var result = lines.join('<br />');
                // break up contiguous blocks of spaces with non-breaking spaces
                result = result.replace(/  /g, ' &nbsp;');
                // tada!
                return result;
            }
            var result = source;
            // ampersands (&)
            result = result.replace(/&/g,'&amp;');
            // less-thans (<)
            result = result.replace(/</g,'&lt;');
            // greater-thans (>)
            result = result.replace(/>/g,'&gt;');
            if (display)
            ...{
                // format for display
                result = format(result);
            }
            else
            ...{
                // Replace quotes if it isn't for display,
                // since it's probably going in an html attribute.
                result = result.replace(new RegExp('"','g'), '&quot;');
            }
            // special characters
            result = special(result);
            // tada!
            return result;
        }
        var profile_username_toolong = '对不起，您的用户名超过 20 个字符，请输入一个较短的用户名。';
        var profile_username_tooshort = '对不起，您输入的用户名小于3个字符, 请输入一个较长的用户名。';
        var profile_username_pass = "可用";
        function checkusername(username)
        ...{
            var unlen = username.replace(/[^