// CHECK CLIENT BROWSER & PLATFORM
// Works: IE4+, NS4+, Opera

  var its;
  var browserName = '';
  var browserNameLong = '';
  var browserNew = '';
  var preloadFlag = false;
  var Macintosh = navigator.userAgent.indexOf('Mac')>0;

  function its() {
    var n = navigator;
    var ua = ' ' + n.userAgent.toLowerCase();
    var pl = n.platform.toLowerCase();
    var an = n.appName.toLowerCase();

    // browser version
    this.version = n.appVersion;
    this.nn = ua.indexOf('mozilla') > 0;

    // 'compatible' versions of mozilla aren't navigator
    if(ua.indexOf('compatible') > 0) {
      this.nn = false;
    }
    
    this.opera = ua.indexOf('opera') > 0;
    this.ie = ua.indexOf('msie') > 0;
    this.major = parseInt( this.version );
    this.minor = parseFloat( this.version );

    // platform
    this.mac = ua.indexOf('mac') > 0;
    this.win = ua.indexOf('win') > 0;

    // workaround for IE5 which reports itself as version 4.0
    if(this.ie) {
      if(ua.indexOf("msie 5") > 1) {
      var msieIndex = navigator.appVersion.indexOf("MSIE") + 5;
      this.major = parseFloat(navigator.appVersion.substr(msieIndex,3));
      }
    }

    return this;
  }

  function browserNaming() {
    its = new its();
    
    // is it a DOM-enabled browser?
    if (!document.getElementById) {
      browserNew = false;
    }
    else {
      browserNew = true;
    }

    // need the name, too
    if (its.opera) {
      browserName = "Opera";
    }
    else if (its.ie) {
      browserName = "IE";
    }
    else {
      browserName = "NS";
    }

    // and the number
    browserNameLong = browserName + its.major;
  }


// PRELOADING THE MOUSEOVER IMAGES
// Works: IE4+, NS4+, Opera

  function createObject(imgName,imgSrc) {
    if (loadingFlag) {
      eval(imgName + ' = new Image()');
      eval(imgName + '.src = "' + imgSrc + '"');
      return imgName;
    }
  }


// MOUSEOVER IMAGE SWITCHING
// Works: IE4+, NS4+, Opera
// Notes: NS4 needs the DIV-name in there if image is in a DIV

  function changeImage(layer,imgName,imgObj) {
    if (allLoadedFlag) {
      if (browserNew) {
        document.getElementById(imgName).src = eval(imgObj+'.src');
      }
      if ((!browserNew) && (browserName == "NS") && (layer!=null)) {
        eval('document.'+layer+'.document.images["'+imgName+'"].src = '+imgObj+'.src');
      }
      else {
        document.images[imgName].src = eval(imgObj+'.src');
      }
    }
  }


// REMOVES THE LINK BORDER IN IE4+, NS6
// Works: IE4+, NS6+
// Notes: In NS6 the select tags are not blurred

  function unblur() {
    this.blur();
  }

  function getLinksToBlur() {
    if ((browserNew) || (browserName == "IE")) {
      if (browserNew) {
        links = document.getElementsByTagName("a");
      }
      else {
        links = document.all.tags("a");
      }
      for(i=0; i<links.length; i++) {
        links[i].onfocus = unblur
      }
    }
  }


// DOM / GET PROPERTY
// Works: IE5+, NS6+, Opera

  function getIdProperty(id,property) {
    var styleObject = document.getElementById( id );
    if (styleObject != null) {
      styleObject = styleObject.style;
        if (styleObject[property]) {
          return styleObject[ property ];
        }
      }
    return (styleObject != null) ?
    styleObject[property] :
    null;
  }


// DOM / SET PROPERTY
// Works: IE5+, NS6+, Opera

  function setIdProperty(id,property,value) {
    var styleObject = document.getElementById( id );
    if (styleObject != null) {
      styleObject = styleObject.style;
      styleObject[ property ] = value;
    }
  }


// HIDE AND SHOW LAYERS
// Works: IE4+, NS4+, Opera

  function hide(id) {
    if (browserNew) {
      setIdProperty(id,"visibility","hidden");
    }
    else {
      if (browserName == "NS") { document.layers[id].visibility = "hide"; }
      else { document.all[id].style.visibility = "hidden"; }
    }
  }

  function show(id) {
    if (browserNew) {
      setIdProperty(id,"visibility","visible");
    }
    else {
      if (browserName == "NS") { document.layers[id].visibility = "show"; }
      else { document.all[id].style.visibility = "visible"; }
    }
  }

// CHANGE DISPLAY VALUE FOR LAYERS
// Works: IE4+, NS4+, Opera

  function switchDisplay(id,value) {
    if (browserNew) {
      setIdProperty(id,"display",value);
    }
    else {
      if (browserName == "NS") {
        document.layers[id].display = value;
      }
      else {
        document.all[id].style.display = value;
      }
    }
  }

function ActiveerNACLive(){
	changeImage('content','tabmatchtrackerlive','tabliveon'); 
	changeImage('content','tabmatchtrackervorige','tabvorigeoff'); 
	changeImage('content','tabmatchtrackervolgende','tabvolgendeoff'); 
	changeImage('content','tabmatchtrackerprogramma','tabprogrammaoff'); 
	switchDisplay('matchtrackerlive','block'); 
	switchDisplay('matchtrackervorige','none'); 
	switchDisplay('matchtrackervolgende','none'); 
	switchDisplay('matchtrackerprogramma','none'); 
	// return false;
}

function ActiveerNACVorige(){
	changeImage('content','tabmatchtrackerlive','tabliveoff'); 
	changeImage('content','tabmatchtrackervorige','tabvorigeon'); 
	changeImage('content','tabmatchtrackervolgende','tabvolgendeoff'); 
	changeImage('content','tabmatchtrackerprogramma','tabprogrammaoff'); 
	switchDisplay('matchtrackerlive','none'); 
	switchDisplay('matchtrackervorige','block'); 
	switchDisplay('matchtrackervolgende','none'); 
	switchDisplay('matchtrackerprogramma','none'); 
	// return false;
}

function ActiveerNACVolgende(){
	changeImage('content','tabmatchtrackerlive','tabliveoff'); 
	changeImage('content','tabmatchtrackervorige','tabvorigeoff'); 
	changeImage('content','tabmatchtrackervolgende','tabvolgendeon'); 
	changeImage('content','tabmatchtrackerprogramma','tabprogrammaoff'); 
	switchDisplay('matchtrackerlive','none'); 
	switchDisplay('matchtrackervorige','none'); 
	switchDisplay('matchtrackervolgende','block'); 
	switchDisplay('matchtrackerprogramma','none'); 
	// return false;
}

function ActiveerNACProgramma(){
	changeImage('content','tabmatchtrackerlive','tabliveoff'); 
	changeImage('content','tabmatchtrackervorige','tabvorigeoff'); 
	changeImage('content','tabmatchtrackervolgende','tabvolgendeoff'); 
	changeImage('content','tabmatchtrackerprogramma','tabprogrammaon'); 
	switchDisplay('matchtrackerlive','none'); 
	switchDisplay('matchtrackervorige','none'); 
	switchDisplay('matchtrackervolgende','none'); 
	switchDisplay('matchtrackerprogramma','block'); 
	// return false;
}