jquery select box change selected option 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: dropdown option selection change event in jquery
$("select [name='element_name']").change(function(){
// condition goes here
});
Example 3: jQuery change select value
$("#mySelectElementID").val("my_new_value"); //change selected option/value with jQuery