function F_Controleer_Velden(input, rqFlds, fldNms)
{
	var fldCheck   = true;
	var fldsNeeded = "\nDe volgende verplichte velden bent u vergeten in te vullen.\n\n\t";

    for(var fldNum = 0; fldNum < rqFlds.length; fldNum++) {
        if ((input.elements[rqFlds[fldNum]].value == "") ||
            (input.elements[rqFlds[fldNum]].value == " ")) {

            fldsNeeded += fldNms[fldNum] + "\n\t";
            fldCheck = false;
            fldsNded = fldsNeeded+"\nKlik op OK en vul de verplichte velden a.u.b. in.\n\t";
        }
    }

    if (fldCheck == true)
    {
        return true;
    }
    else
    {
        alert(fldsNded);
        return false;
    }
}

function F_ContactForm(input)
{
	var v_VerplichteVelden = new Array("naam", "email", "bericht");
	var v_VeldNamen = new Array("Uw naam", "Uw emailadres", "Het bericht");
	output = F_Controleer_Velden(input, v_VerplichteVelden, v_VeldNamen);

	return output;
}