jquery select option change selected item code example
Example 1: set select option as selected jquery
$(document).ready(function() {
$("#gate option[value='Gateway 2']").prop('selected', true);
// you need to specify id of combo to set right combo, if more than one combo
});
Example 2: select option value jquery
$("select.country").change(function(){
var selectedCountry = $(this).children("option:selected").val();
alert("You have selected the country - " + selectedCountry);
});