1. 去除字符中重复的逗号为单个逗号
var NewWeeks = ",1,,2,3,4,,,,7,8";
NewWeeks = NewWeeks.replace(/,{2,}/g,','); //结果为:,1,2,3,4,5,6,7,8
2. 只允许6到15位字母、数字组合
validate: function(val) { //只允许6到15位字母、数字组合
return (/^(?![^a-zA-Z]+$)(?!\D+$).{6,15}$/).test(val);
},