Javascript timer not working

In the code below...
The timer is not waiting 7 seconds...
It is redirecting immediately
I need the delay

    <script type="text/javascript">
        window.onload = function () {
            var foo = 'http://members.mywebsite.com/gp.aspx?enc=' + getParameterByName('enc');
            //alert(foo);
            setTimeout("window.location='" + foo + "'", 7000);
        };
        
        function getParameterByName(name, url) {
            if (!url) url = window.location.href;
            name = name.replace(/[\[\]]/g, "\\$&");
            var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
                results = regex.exec(url);
            if (!results) return null;
            if (!results[2]) return '';
            return decodeURIComponent(results[2].replace(/\+/g, " "));
        }
    </script>

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