jquery Gets the value of multiple select name

Html

{foreach from= $month _arr item=datearr key=i}
<tr>
<td>{$DATEARR .m}</td>
<td>
<select name= "Start_month" class= ' Month start_month_{$i} ' >
{foreach from= $dateArr. Start_date.month item=monthlist Key=month_key}
{if $month _key== $dateArr. Start_date.default_month}
<option value= "{$month _key}" label= "{$month _key}" selected= "selected" >{$monthList}</option>
{Else}
<option value= "{$month _key}" label= "{$month _key}" >{$monthList}</option>
{/if}
{/foreach}
</select>

<select name= "Start_day" class= "start_day_{$i}" >
{foreach from= $dateArr. Start_date.day item=daylist Key=day_key}
{if $dayList = = $dateArr. Start_date.default_day}
<option value= "{$dayList}" label= "{$dayList}" selected= "selected" >{$dayList}</option>
{Else}
<option value= "{$dayList}" label= "{$dayList}" >{$dayList}</option>
{/if}
{/foreach}
</select>

{if $dateArr. Start_date.year}
<select name= "Start_year" class= "Start_year" >
{foreach from= $dateArr. Start_date.year item=yearlist Key=year_key}
<option value= "{$yearList}" label= "{$yearList}" >{$yearList}</option>
{/foreach}
</select>
{/if}
<span class= "start_date_{$i}" ></span>
</td>

<td>
<select name= "End_month" class= ' Month end_month_{$i} ' >
{foreach from= $dateArr. End_date.month item=monthlist Key=month_key}
{if $month _key== $dateArr. End_date.default_month}
<option value= "{$month _key}" label= "{$month _key}" selected= "selected" >{$monthList}</option>
{Else}
<option value= "{$month _key}" label= "{$month _key}" >{$monthList}</option>
{/if}
{/foreach}
</select>

<select name= "End_day" class= "end_day_{$i}" >
{foreach from= $dateArr. End_date.day item=daylist Key=day_key}
{if $dayList = = $dateArr. End_date.default_day}
<option value= "{$dayList}" label= "{$dayList}" selected= "selected" >{$dayList}</option>
{Else}
<option value= "{$dayList}" label= "{$dayList}" >{$dayList}</option>
{/if}

{/foreach}
</select>
<span class= "end_date_{$i}" ></span>
</td>
</tr>
{/foreach}

<tr border= ' 0 ' >
<TD colspan= "3" >
<input type= "Submit" class= "Ibm-btn-arrow-pri" id= "Submit" name= "submit" value= "Submit" >
</td>
</tr>

</tbody>
</table>

Js

$ (document). Ready (function () {
var year = $ ("#year"). Val ();
var month = ';
$ ('. Month '). Change (function () {
var month = $ (this). Children (' option:selected '). Val ();
var this_month_str = $ (this). attr (' class ');
var This_month_arr = This_month_str.split (");
var this_month = this_month_arr[1];
This_month = This_month.replace ("Month", "Day");

var Month_type_arr = This_month.split ('_');
var month_type = month_type_arr[0];

$ ('. ') +month_type+ ' _month_ ' +month+ ' option[value= ' +this_month+ ']. attr ("selected", true);

if (month) {
$.post ("url", {month:month, year:year},function (data) {

var Day_arr = (New Function ("", "Return" +data)) ();
var max_num = day_arr.length;
var datestr = ';
$.each (Day_arr,function (index,value) {
var str= "<option value=" +day_arr[index]+ ">" +day_arr[index]+ "</option>";
if (month_type== ' end ') {
if (day_arr[index]==max_num) {
var str= "<option selected= ' selected ' value=" +day_arr[index]+ ">" +day_arr[index]+ "</option>";
}
}
DATESTR+=STR;
});
$("." +this_month). HTML (DATESTR);
});
}

});
$ ('. Start_year '). Change (function () {
var start_year = $ (this). Children (' option:selected '). Val ();
$.post ("url", {start_year:start_year, year:year},function (data) {
var Day_arr = (New Function ("", "Return" +data)) ();
var monthstr = ';
var daystr = ';
$.each (Day_arr,function (index,value) {
if (index== ' month ') {
$.each (Value,function (m,val) {
var mstr= "<option selected= ' selected ' value=" +m+ ">" +val+ "</option>";
Monthstr+= MSTR;
});
}
if (index== ' Day ') {
$.each (Value,function (m,val) {
var dstr= "<option selected= ' selected ' value=" +val+ ">" +val+ "</option>";
daystr+= Dstr;
});
}
});
$ (". start_month_1"). HTML (MONTHSTR);
$ (". Start_day_1"). HTML (DAYSTR);
});
});

$ (' #submit '). Click (function () {
var year = $ ("#year"). Val ();

var Start_m_arr = new Array ();
var start_m_all = "";
$ ("Select[name=start_month] option[selected]"). each (function (i) {
$ ("Select[name=start_month]"). each (function (i) {
var val = $ (this). Val ();
var node = i!=11? Val + ",": Val;
var node = val + ', ';
Start_m_arr.push (node);
Start_m_all + = node;
});

var Start_d_arr = new Array ();
var start_d_all = "";
$ ("Select[name=start_day] option[selected]"). each (function (i) {
$ ("Select[name=start_day]"). each (function (i) {
var val = $ (this). Val ();
var node = i!=11? Val + ",": Val;
var node = val + ', ';
Start_d_arr.push (node);
Start_d_all + = node;
});

var start_year = ';
if ($ (". Start_year")) {
Start_year = $ (". Start_year"). Val ();
}

var End_m_arr = new Array ();
var end_m_all = "";
$ ("Select[name=end_month] option[selected]"). each (function (i) {
$ ("Select[name=end_month]"). each (function (i) {
var val = $ (this). Val ();
var node = i!=11? Val + ",": Val;
End_m_arr.push (node);
End_m_all + = node;
});

var End_d_arr = new Array ();
var end_d_all = "";
$ ("Select[name=end_day] option[selected]"). each (function (i) {
$ ("Select[name=end_day]"). each (function (i) {
var val = $ (this). Val ();
var node = i!=11? Val + ",": Val;
End_d_arr.push (node);
End_d_all + = node;
});

if (start_m_all!= ' && start_d_all!= ' && end_m_all!= ' && end_d_all!= ') {
$.post ("url", {start_month:start_m_all, Start_day:start_d_all, End_month:end_m_all,
End_day:end_d_all, Year:year, start_year:start_year},function (data) {
var Return_arr = (New Function ("", "Return" +data)) ();
var status = Return_arr.status;

if (status== true) {
Window.location.href = "url?year=" + year;
}else if (status== false) {
Alert (' Added Period billing error ');
}
});
}
});
});

jquery Gets the value of multiple select name