Remove duplicate elements from a drop down list using javascript

Answer 1

In ES3 POJS you could do this.

Javascript

function removeDuplicateOptions(selectNode) {
    if (typeof selectNode === "string") {
        selectNode = document.getElementById(selectNode);
    }

    var seen = {},
        options = [].slice.call(selectNode.options),
        length = options.length,
        previous,
        option,
        value,
        text,
        i;

    for (i = 0; i < length; i += 1) {
        option = options[i];
        value = option.value,
        text = option.firstChild.nodeValue;
        previous = seen[value];
        if (typeof previous === "string" && text === previous) {
            selectNode.removeChild(option);
        } else {
            seen[value] = text;
        }
    }
}

removeDuplicateOptions("Fruits");

On jsfiddle