JS 常用代码片段截取（三）

10.缓存？？？dialog
window.showModalDialog弹出的 Dialog 无刷新，加上缓存的机制，修改的前端代码不会被即使更新，
在coding的时候比较麻烦，用户使用的时候感本人觉上没什么的大的影响，除非特殊的使用。
为此据说可以在URl上加 &__=new Date()，就能解决

11.focus（）& blur（）
写代码一定要细心，细节决定成败啊。从下层的意见反馈到上层的回复再到下层的执行，
不晓的要多久才能决定一个feature，由于人人都怕麻烦，依旧决定使用N年前的alert（）来进行validate。
粗心的我在使用JQuery的blur（）和focus（）检查了N旧都不知道错在哪里，当事件失焦的时候触发一个function，
不满足条件是进行alert（）；forcus（）。不晓的咋的，在条件判断中也写了一个forcus（），完了，无线的弹出alert（）；
死了。在使用此函式的时候一定要逻辑清晰。不过这种也算是一个恶意代码吧。。。

12.JQuery 中$("title").html("XXX")在IE中会出现Unexpected call to method or property access.
主要是因为append（）方法。它使用了getDocumentByTagName（），当遇到title的时候使用innerHtml等方法来添加或者
修改title的content时候就会出现这个问题了。
明明javascript中有个document.title的方法。唉，直接使用就好了。
这个还是多亏了NetBeans的对javascript良好的支持，代码补全，尤其是代码提示上的那个解释和Demo。让我为之感动啊
基础不良，记忆超差的我在这里力挺下。Sun被收购，不知道NetBeans下落会如何，伤心ing。。。

13.javascript 使用正则表达式——常用代码验证
// http://docs.jquery.com/Plugins/Validation/Methods/minlength
       minlength: function(value, element, param) {
           return this.optional(element) || this.getLength($.trim(value), element) >= param;
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/maxlength
       maxlength: function(value, element, param) {
           return this.optional(element) || this.getLength($.trim(value), element) <= param;
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/rangelength
       rangelength: function(value, element, param) {
           var length = this.getLength($.trim(value), element);
           return this.optional(element) || ( length >= param[0] && length <= param[1] );
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/min
       min: function( value, element, param ) {
           return this.optional(element) || value >= param;
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/max
       max: function( value, element, param ) {
           return this.optional(element) || value <= param;
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/range
       range: function( value, element, param ) {
           return this.optional(element) || ( value >= param[0] && value <= param[1] );
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/email
       email: function(value, element) {
           // contributed by Scott Gonzalez: http://projects.scottsplayground.com/email_address_validation/
           return this.optional(element) || /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\$[\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/url
       url: function(value, element) {
           // contributed by Scott Gonzalez: http://projects.scottsplayground.com/iri/
           return this.optional(element) || /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\($\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\*\+,;=]|:|@)|\/|\?)*)?$/i.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/date
       date: function(value, element) {
           return this.optional(element) || !/Invalid|NaN/.test(new Date(value));
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/dateISO
       dateISO: function(value, element) {
           return this.optional(element) || /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/dateDE
       dateDE: function(value, element) {
           return this.optional(element) || /^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/number
       number: function(value, element) {
           return this.optional(element) || /^-?(?:\d+|\d{1,3}(?:,\d{3})+)(?:\.\d+)?$/.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/numberDE
       numberDE: function(value, element) {
           return this.optional(element) || /^-?(?:\d+|\d{1,3}(?:\.\d{3})+)(?:,\d+)?$/.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/digits
       digits: function(value, element) {
           return this.optional(element) || /^\d+$/.test(value);
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/creditcard
       // based on http://en.wikipedia.org/wiki/Luhn
       creditcard: function(value, element) {
           if ( this.optional(element) )
               return "dependency-mismatch";
           // accept only digits and dashes
           if (/[^0-9-]+/.test(value))
               return false;
           var nCheck = 0,
               nDigit = 0,
               bEven = false;

           value = value.replace(/\D/g, "");

           for (n = value.length - 1; n >= 0; n--) {
               var cDigit = value.charAt(n);
               var nDigit = parseInt(cDigit, 10);
               if (bEven) {
                   if ((nDigit *= 2) > 9)
                       nDigit -= 9;
               }
               nCheck += nDigit;
               bEven = !bEven;
           }

           return (nCheck % 10) == 0;
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/accept
       accept: function(value, element, param) {
           param = typeof param == "string" ? param.replace(/,/g, '|') : "png|jpe?g|gif";
           return this.optional(element) || value.match(new RegExp(".(" + param + ")$", "i"));
       },

       // http://docs.jquery.com/Plugins/Validation/Methods/equalTo
       equalTo: function(value, element, param) {
           return value == $(param).val();
       }

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