[RESOLVED] Passing a variable as a parameter into getElementById()?

[blakemckenna]

Is it possible to pass a variable as the parameter into a getElementById()? I've been trying to find answers on google and not having much luck. I've heard some say you can but with no examples.

This is what I'm trying to do.

    function showImage(file1) {
        var largeImage = document.getElementById(file1);

        largeImage.style.display = 'block';
        largeImage.style.width=500+"px";
        largeImage.style.height="auto";

        var url=largeImage.getAttribute('src');
        window.open(url,'Image','width=largeImage.stylewidth,height=largeImage.style.height,resizable=1');
    }

Thanks,