How to send data from javascript to servlet inside url

Question

this is my javascript code

$('a').click(function() {
    ty = $(this).index();
    de = document.getElementsByTagName('klw')[ty].innerHTML;
    alert("this is " + de);
});

want to send "de" data from $('a') to the other method that is

function jill() {
    alert("hi" + de);

    document.location.href = "openmessage";
};

openmessage is the name of servlet. And from here to the servlet and how to print it on the servlet