dwz 解决remote验证唯一时缓存问题。

remote: function( value, element, param )

{    if ( this.optional(element) )

{     return "dependency-mismatch";    }

   param = param + "&date=" + new Date().getTime();   //这句是重点   加个时间戳

 var previous = this.previousValue(element);   

 if (!this.settings.messages[element.name] )

{     this.settings.messages[element.name] = {};    }