var certCardValid = function(id){         var arrVerifyCode = [1,0,"x",9,8,7,6,5,4,3,2];         var wi = [7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2];         var Checker = [1,9,8,7,6,5,4,3,2,1,1];         var msg = "";         if(id.length != 15 && id.length != 18) {             Ext.MessageBox.alert("信息提示","身份证号共有15位或18位。");             return false;         }         var ai = id.length == 18 ?  id.substring(0,17) : id.slice(0,6) + "19" + id.slice(6,16);           if (!/^/d+$/.test(ai)) {             Ext.MessageBox.alert("信息提示","身份证除最后一位外，必须为数字。");             return false;         }            var yyyy = ai.slice(6,10);         var mm = ai.slice(10,12)-1;          var dd = ai.slice(12,14);         var d = new Date(yyyy,mm,dd);         var now = new Date();         var year = d.getFullYear();         var mon = d.getMonth();          var day = d.getDate();           if (year != yyyy || mon != mm || day != dd) {             Ext.MessageBox.alert("信息提示","身份证无效。");             return false;         }           for(var i = 0,ret = 0; i < 17; i++){             ret += ai.charAt(i) * wi[i];         }         ai += arrVerifyCode[ret %= 11];         ai = ai.toUpperCase();           if(id.length == 18 && id != ai){             Ext.MessageBox.alert("信息提示","身份证无效。");             return false;         }         return true;     };