Related question regarding URLs, javascript and passing variables

With regard to this closed question:

The answer works well, but I'm hoping to extend the same script to accommodate more variables.

For example: and so on.

How would I augment the javascript? Which, by the way, works perfectly well for a single variable.

Many thanks,
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Rainer JeschorCommented:
from the related question just call this function multiple times:
window.onload = function() {
    document.getElementById("YOUR_INPUT_FIELD_ID_EMAIL").value = gup("EMAIL");
    document.getElementById("YOUR_INPUT_FIELD_ID_FIRST").value = gup("firstname");
document.getElementById("YOUR_INPUT_FIELD_ID_LAST").value = gup("lastname");

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 why not use a generic javascript function that allows you to fetch any parameter from the url?

function getParameterByName(name) {
    name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
    var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
        results = regex.exec(;
    return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));

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and call it like:

var email = getParameterByName('email');

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joibrooksAuthor Commented:
Many thanks for a quick response. Your services and experts are invaluable!

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