Question

After I click on a li-element where the class-attribute contains “disabled selected”, disabled gets the value “true” but after stepping out the function the last if-statement is called.

    var disabled = false;
    $("li").click(function () {
        if ($(this).attr("class") == "disabled selected") {
            disabled = true;
        }
    });
    if (disabled) {
        alert("disabled is true");
    }
    if (!disabled) {
        alert("disabled is false");
    }

Answer 1

You should move both the if statements inside the click handler.

var disabled = false;
$("li").click(function () {
    if ($(this).attr("class") == "disabled selected") {
        disabled = true;
    }
    if (disabled) {
        alert("disabled is true");
    }
    else {
        alert("disabled is false");
    }
});