var myAjax = null;

try
{
    myAjax = new ActiveXObject('Microsoft.XMLHTTP');
}
catch (e)
{
    myAjax = new XMLHttpRequest();
}


myAjax.onreadystatechange = function()
{
    if (myAjax.readyState == 4)
    {
        document.getElementById('jobofweekContainer').innerHTML = myAjax.responseText;
    }
}

myAjax.open('GET', 'jobofweek.php', true);
myAjax.send(null);