function validateRequiredField(controlIdentifier)
{
    var ret = true;
    var control = document.getElementById(controlIdentifier);

    if(control!=null)
    {
        if(control.value==null)
            ret = false;
        else if(control.value=="")
            ret = false;
        else
            ret = true;
    }
    else
        ret = true;
        
    if(ret==false)
    {
        control.style.border = "solid 2px red";
    }
    else
    {
        control.style.border = "solid 1px #333";
    }   
        
    return ret;
}