function Fensterhoehe () {
  if (window.innerHeight) {
    return window.innerHeight;
  } else if (document.body && document.body.offsetHeight) {
    return document.body.offsetHeight;
  } else {
    return 0;
  }
}

function setFooterPos() {
	var fh = Fensterhoehe();
	var tableH = fh - 50;

	document.getElementById("footer").style.position = "relative";
	document.getElementById("footer").style.top = tableH + "px";
}

function show (el, action) {

  var actStr = "none";

  if (document.getElementById) {
  	if(action >= 1) {
  		actStr = "block";
  	} else {
  		actStr = "none";
  	}
    document.getElementById(el).style.display = actStr;
  }
}

function checkEmail(email) {
	var proto  = "(mailto:)?";
	var usr    = "([a-zA-Z0-9][a-zA-Z0-9_.-]*|\"([^\\\\\x80-\xff\015\012\"]|\\\\[^\x80-\xff])+\")";
	var domain = "([a-zA-Z0-9][a-zA-Z0-9._-]*\\.)*[a-zA-Z0-9][a-zA-Z0-9._-]*\\.[a-zA-Z]{2,5}";
	var regex  = "^" + proto + "?" + usr + "\@" + domain + "$";

	var rgx    = new RegExp(regex);
	return rgx.exec(email) ? true : false;
}

function parseEmail(the_form, mail) {
	var f = document.forms[the_form];
	if(!checkEmail(mail)) {
		alert('Die eingegebene EMail-Adresse ist nicht korrekt!');
		f.email.focus(); return false;
	} else {
		alert('EMail-Adresse OK...speichern!');
		return true;
	}
}

function ocw(url, name, width, height, additionalOptions)
{
	if (additionalOptions == null || additionalOptions.length == 0)
		var options =  "width=" + width + ",height=" + height;
	else
		var options =  "width=" + width + ",height=" + height + "," + additionalOptions;

	var x = (screen.width  / 2) - (width  / 2);
	var y = (screen.height / 2) - (height / 2);

	var win = window.open(url, name, options);
	win.moveTo(x, y);
	win.focus();
}