/**
* Cross-Browser Ereignis-Registrar v.
* Scott Andrew
*/

function toggle(){
	var div1 = document.getElementById('agbs')
	if (div1.style.display == 'none') {
		div1.style.display = 'block'
	} else {
		div1.style.display = 'none'
	}
}



function addEvent(obj, eventType, functionName, useCaption)
{
  if (obj.addEventListener) {
    obj.addEventListener(eventType, functionName, useCaption);
    return true;
  } else {
    var retVal = obj.attachEvent("on"+eventType, functionName);
    return retVal;
  }
}
function sumUp () {
		
	var cf_field_4 = Number(document.getElementById("cf_field_4").value);
	var cf_field_5 = Number(document.getElementById("cf_field_5").value);
	var cf_field_6 = Number(document.getElementById("cf_field_6").value);
	var cf_field_7 = Number(document.getElementById("cf_field_7").value);
	var total = cf_field_4 + cf_field_5 + cf_field_6 + cf_field_7;
	var wort = "";
	if (total == 1) {wort = " Frühstück "} else {wort = " Frühstücke ";}
	document.getElementById("cf_field_8").value = total + wort + "bestellt";
}


function addEvents () {
	addEvent(document.getElementById("cf_field_4"), "change", sumUp, false);
	addEvent(document.getElementById("cf_field_5"), "change", sumUp, false);
	addEvent(document.getElementById("cf_field_6"), "change", sumUp, false);
	addEvent(document.getElementById("cf_field_7"), "change", sumUp, false);
}


window.onload = addEvents;