Manipulate a SELECT input or dropdown list with jQuery. Get the value, get the text value, set the value, and append a new value.
//get the value
$("#myselect").val();
//get text value
$("#myselect option:selected").text();
//set select
$("#myselect").val(setToValue);
$("#myselect").val(1);
//append a new value
$('#mySelect')
         .append($("<option></option>")
         .attr("value", key)
         .text(value));