Select dropdown option at the time of document load using Jquery

Use

$(document).ready(function(){

$('#select-Id').val("rightVal");

});

Example: For

<select id='days'>
<option value="sun">Sunday</option>
<option value="mon">Monday</option>
</select>

Use below code to select Monday

$(document).ready(function(){

$('#days').val("mon");

});

HTML:

<select id="sel">
<option value="1">Option 1</option>
<option value="2">Option 2</option>
<option value="3">Option 3</option>
</select>​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

Jquery:

​

$(document)​.ready(function(){


    $('#sel').val('2');


    })​;​

See Demo

You can use

$(document).ready(function(){
   $('#sel').val('myValue'); // to set the current value
   var selectedvalue=$('#selectId').val(); // get the selected value
   alert(selectedvalue); 
});

DEMO.