How to pass variable to href in javascript?

Question

How to pass this variable value here? Below code is not working. And all other discussions on Stackoverflow are unclear.

Answer 1

Try this:

function check() {
    var dist = document.getElementById('value').value;

    if (dist) {
        window.location.href = "district.php?dist=" + dist;
    } else {
        alert('Oops.!!');
    }
}