May be my english is not good enough what problem is.My code is in below:

var check_arr={

"server": {type:0,reg:"",fn_Y:""},

"port": {type:1,reg:"",fn_Y:""},

"db_user": {type:1,reg:"",fn_Y:""},

"db_password": {type:1,reg:"",fn_Y:""},

"db_name": {type:1,reg:"",fn_Y:""},

"db_prefix": {type:1,reg:"",fn_Y:""},

"admin_user": {type:1,reg:"",fn_Y:""},

"admin_pw": {type:1,reg:"",fn_Y:""},

"admin_re_pw": {type:1,reg:"",fn_Y:""},

"sys_prefix": {type:1,reg:"",fn_Y:""}

};

var bind_fn=function(){

var a=[];

for(var key in check_arr){

a.push($(key).val());

//key is id of input,this can't work,but$(document.getElementById(key).val() can work well

}

alert(a.join());

};

I think this should be a bug,I don't want to used $(document.getElementById(key).val() in the future.