//PMU-Content-Layer ein/ausblenden

var layers=new Array();
layers[0]="LayAnschrift";
layers[1]="LayGaestebuch";
layers[2]="LayImpressum";


// BROWSER SNIFFER (Sniff out the good and bad browsers)
function Is() {
    var agent = navigator.userAgent.toLowerCase();
    this.major = parseInt(navigator.appVersion);
    this.minor = parseFloat(navigator.appVersion);
    this.ns  = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
    this.ns2 = (this.ns && (this.major == 2));
    this.ns3 = (this.ns && (this.major == 3));
    this.ns4b = (this.ns && (this.minor < 4.04));
    this.ns4 = (this.ns && (this.major >= 4));
    this.ie   = (agent.indexOf("msie") != -1);
    this.ie3  = (this.ie && (this.major == 2));
    this.ie4  = (this.ie && (this.major >= 4));
    this.op3 = (agent.indexOf("opera") != -1);
    this.win   = (agent.indexOf("win")!=-1);
    this.mac   = (agent.indexOf("mac")!=-1);
    this.unix  = (agent.indexOf("x11")!=-1);
}
var is = new Is();


//Layer-Startparameter
var x0 = 260;   //x-Startposition des Layers
var y0 = 240;  //y-Startposition des Layers
var obj = null;
var cur_layer = "";


if(is.ie4)
 {
    doc = "document.all";
    sty = ".style";
//    htm = "";
    view_on = 'visible';
    view_off = 'hidden';
 }
 else if(is.ns4)
 {
    doc = "document";
    sty = "";
//    htm = ".document";
    view_on = 'show';
    view_off = 'hide';	
 }
 

function bix_LayInit()
{
  for (i=1;i<layers.length;i++)
  {
    obj = eval(doc + '["' + layers[i] + '"]' + sty);
    obj.visibility = view_off;
    obj.left = x0;
    obj.top = y0;
  }

}

//layer ein und ausblenden
function bix_LayOnOff(which)
{

  //alten sichtbaren layer ausblenden
  if (cur_layer != "")
  {
    obj = eval(doc + '["' + cur_layer + '"]' + sty);
  }
  else
  {
    cur_layer = layers[0]
    obj = eval(doc + '["' + cur_layer + '"]' + sty);
  }
  obj.visibility = view_off;
  cur_layer=which;

  //gewünschten layer einblenden
  obj = eval(doc + '["' + which + '"]' + sty);
  obj.visibility = view_on;

}