js yyyy-mm-dd 正则

exdate:function(value,element){
if(value==""){
return false;
}
// validate is  chinese
//if(escape(value).indexOf("%u") < 0){
// return false;
//}
if(value.length ==4){
if(value.length==4){
                                 var re = /^(\d{4})$/;
var m = re.exec(value);
if (m == null) return false;
var d = new Date(m[1]);
return this.optional(element) || (d.getFullYear()==m[1]);
}else if(value.length==7){

var re = /^(\d{4})-((0?[1-9]|1[0-2]))$/;
var m = re.exec(value);
if (m == null) return false;
var d = new Date(m[1],m[3]-1);
return this.optional(element) || (d.getFullYear()==m[1] && d.getMonth()==(m[3]-1));
}else if(value.length == 10){
var re = /^(\d{4})(\/|-)(\d{1,2})\2(\d{1,2})$/;
var m = re.exec(value);
if (m == null) return false;
var d = new Date(m[1],m[3]-1,m[4]);
return this.optional(element) || (d.getFullYear()==m[1] && d.getMonth()==(m[3]-1) && d.getDate()==m[4]);
}
return false;
}
}