function PopulatePortal() 
{
    if (document.getElementById('cmdSelectPortal'))
    {
        var dropdown = document.getElementById('cmdSelectPortal');
        addOption(dropdown, '-- select a portal --', '')
        addOption(dropdown, 'Strategy', 'http://www.gibs.co.za/igibs/strategy.aspx')
        addOption(dropdown, 'Leadership', 'http://www.gibs.co.za/igibs/leadership.aspx')
        addOption(dropdown, 'Entrepreneurship', 'http://www.gibs.co.za/igibs/entrepreneurship.aspx')
        addOption(dropdown, 'Marketing', 'http://www.gibs.co.za/igibs/marketing.aspx')
        addOption(dropdown, 'Finance', 'http://www.gibs.co.za/igibs/finance.aspx')
        addOption(dropdown, 'Career Management', 'http://www.gibs.co.za/igibs/career-management.aspx')
        addOption(dropdown, 'Dynamic Markets', 'http://www.gibs.co.za/igibs/dynamic-markets.aspx')
        addOption(dropdown, 'Sustainability', 'http://www.gibs.co.za/igibs/sustainability.aspx')
    }
}

function addOption(selectbox, text, value) 
{
    var optn = document.createElement("OPTION");
    optn.text = text;
    optn.value = value;
    selectbox.options.add(optn);
}

function SelectPortal(dropdown)
{
    if (dropdown.options[dropdown.selectedIndex].value != '')
    {
        document.location.href = dropdown.options[dropdown.selectedIndex].value;
    }
}

function isdefined(variable) 
{
    return (typeof (window[variable]) == "undefined") ? false : true;
}

addLoadEvent(function() { PopulatePortal(); });