function checkForm()
{
    for(i = 0 ; i < required.length ; i++ )
        if(!checkField(required[i]))
            return false;
    return true;
}
            
function checkField(id)
{
    var retVal = true;
    var field = document.getElementById(id);
    
    if(field.value == '')
    {
        var title = field.getAttribute('title');
        alert("Please provide the following information: " + title);
        field.focus();
        retVal = false;
    }
    return retVal;
}