var activeButton = null;
var nextlink;
// Hauptmenü javascript..

function Browser() {

  var ua, s, i;

  this.isIE    = false;  // Internet Explorer
  this.isNS    = false;  // Netscape
  this.version = null;

  ua = navigator.userAgent;

  s = "MSIE";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isIE = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  s = "Netscape6/";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = parseFloat(ua.substr(i + s.length));
    return;
  }

  // Treat any other "Gecko" browser as NS 6.1.

  s = "Gecko";
  if ((i = ua.indexOf(s)) >= 0) {
    this.isNS = true;
    this.version = 6.1;
    return;
  }
}

var browser = new Browser();

// Global variable for tracking the currently active button.

var activeButton = null;

// Capture mouse clicks on the page so any active button can be
// deactivated.

if (browser.isIE)
  document.onmousedown = pageMousedown;
if (browser.isNS)
  document.addEventListener("mousedown", pageMousedown, true);
  
function pageMousedown(event) {

  var el;

  // If there is no active menu, exit.

  if (!activeButton)
    return;

  // Find the element that was clicked on.

  if (browser.isIE)
    el = window.event.srcElement;
  if (browser.isNS)
    el = (event.target.className ? event.target : event.target.parentNode);

  // If the active button was clicked on, exit.

  if (el == activeButton)
    return;

  // If the element clicked on was not a menu button or item, close the
  // active menu.
	//alert (el.className);
  if (el.className != "menuButton"  && el.className != "menuItem" &&
      el.className != "menuItemSep" && el.className != "menu"  && el.className != "dataTableRowSelected" &&
	  el.className != "dataTableRow" && el.className != "dataTableContent")
    resetButton(activeButton);
}

function getPageOffsetTop(el) {

  // Return the true y coordinate of an element relative to the page.

  return el.offsetTop + (el.offsetParent ? getPageOffsetTop(el.offsetParent) : 0);
}

function buttonClick2(button, menuName, string) {

  // Blur focus from the link to remove that annoying outline.

	nextlink = string;

  //button.blur();

  // Associate the named menu to this button if not already done.

  if (!button.menu)
    button.menu = document.getElementById(menuName);
  // Reset the currently active button, if any.
    document.getElementById(menuName).style.display='block';
  if (activeButton && activeButton != button)
    resetButton2(activeButton);

  // Toggle the button's state.

 /* if (button.isDepressed)
    resetButton(button);
  else
   */ depressButton2(button);

  return false;
}

function depressButton2(button) {

  var w, dw, x, y, e;
   //Dummywert und oben e deklariert
   e = 0;
  // Change the button's style class to make it look like it's depressed.

 // button.className = "menuButtonActive";

  // For IE, set an explicit width on the first menu item. This will
  // cause link hovers to work on all the menu's items even when the
  // cursor is not over the link's text.

  if (browser.isIE && !button.menu.firstChild.style.width) {
    w = button.menu.firstChild.offsetWidth;
    button.menu.firstChild.style.width = w + "px";
    dw = button.menu.firstChild.offsetWidth - w;
    w -= dw;
    button.menu.firstChild.style.width = w + "px";
  }

  // Position the associated drop down menu under the button and
  // show it. Note that the position must be adjusted according to
  // browser, styling and positioning.

  x = (document.all) ? window.event.x + document.body.scrollLeft : e.pageX;
  y = getPageOffsetTop(button) + 12;
  if (browser.isIE) {
    x += 2;
    y += 2;
  }
  if (browser.isNS && browser.version < 6.1)
    y--;
  else 
  	x = 255;
  // Position and show the menu.
  //button.menu.style.left = x + "px";
  //button.menu.style.top  = y + "px";
  button.menu.style.visibility = "visible";

  // Set button state and let the world know which button is
  // active.

  button.isDepressed = true;
  activeButton = button;
}


function resetButton2(button) {

  // Restore the button's style class.

//  button.className = "menuButton";

  // Hide the button's menu.

  if (button.menu)
    button.menu.style.visibility = "hidden";

  // Set button state and clear active menu global.

  button.isDepressed = false;
  activeButton = null;
}

function resetButton(button) {

  // Restore the button's style class.

//  button.className = "menuButton";

  // Hide the button's menu.

  if (button.menu)
    button.menu.style.visibility = "hidden";

  // Set button state and clear active menu global.

  button.isDepressed = false;
  activeButton = null;
}