I need compatible JavaScript code for document.createElementNS () in older versions of IE

Take a look at the following post from the google group. There's a workaround that might help you: http://code.google.com/p/svgweb/issues/detail?id=625

Workaround (from the link above):

window.onload = function() {
    function onCreateElementNsReady(func) {
        if (document.createElementNS != undefined) {
            func();
        } else {
            setTimeout(function() { onCreateElementNsReady(func); }, 100);
        }
    }

    onCreateElementNsReady(function() {
        var svg = document.createElementNS(svgns, 'svg');
        // ...
    });
};