jquery set select selected 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: change value of drop down using jquery
$('#ddlID').val('New_OptionValue').change()
Example 3: jquery set select value
$("div.id_100 select").val("val2");