/* jseyes.js


The classic Xeyes in JavaScript
Written by Pintér Gábor
Email: propix@freemail.hu
Web: http://www.propix.hu

Erweitert und angepaßt von O. E.
engeltech.de

Revisions:
  V1.0  10/14/2001  Original release

  V2.0   05.12.2007 - Bug excede - fuer xhtml angepasst /engola

  V3.0  Lanu Face

Usage:
  1. Include this file from the head of your page
  2. Define parameters or accept the defaults
  3. Insert the image

Requirements: moderner Browser.

1. Include jseyes.js from the head of your page
Insert the following line into the head of your page:
  <script src="jseyes.js"></script>

2. Define parameters
You can accept the defaults or assign new values to these variables:

jseyesimg="jseyes.gif"
  The main image. Please do not edit.

jseyeimg="jseyeblue.gif"
  The image of the eye. Must be a 21x29 solid ellipse with transparent background.


4. Insert the image
Call jseyes() where you want to see the image:
  <script>
    jseyes();
  </script>



Example: http://www.propix.hu/www/jseyes/jseyes.html
Example: http://ver-tarn.de/xeye/

*/


// Defaults
var jseyesimg="http://lanu.blogger.de/static/antville/lanu/files/lanu1.png";
var jseyeimg="http://lanu.blogger.de/static/antville/lanu/files/auge.gif";
var jseyeslink="http://lanu.blogger.de"; //sinnlos, weil untere Ebene nicht klickbar.


// Internal
var jseyeso=null, jseye1=null, jseye2=null;


// Browser detection

// Global variables
var browserversion=0.0;
var browsertype=0; // 0: unknown; 1:MSIE; 2:NN

// Return true if MSIE or NN detected
function browserdetect() {
  var agt= navigator.userAgent.toLowerCase();
  var appVer= navigator.appVersion.toLowerCase();
  browserversion= parseFloat(appVer);
  var iePos= appVer.indexOf('msie');
  if (iePos!=-1) browserversion= parseFloat(appVer.substring(iePos+5, appVer.indexOf(';',iePos)));
  var nav6Pos = agt.indexOf('netscape6');
  if (nav6Pos!=-1) browserversion= parseFloat(agt.substring(nav6Pos+10))
  browsertype= (iePos!=-1) ? 1 : (agt.indexOf('mozilla')!=-1) ? 2 : 0;
  return(browsertype>0);
}

browserdetect();



// General utils

// Find object by name or id
function jseyesobj(id) {
  var i, x;
  x= document[id];
  if (!x && document.all) x= document.all[id];
  for (i=0; !x && i<document.forms.length; i++) x= document.forms[i][id];
  if (!x && document.getElementById) x= document.getElementById(id);
  return(x);
}


// Move eyes
function jseyesmove(x, y) {
  var ex, ey, dx, dy, r;
  if (jseyeso && jseye1 && jseye2 && jseyeso.style) {
    ex=jseyeso.offsetLeft+46; ey=jseyeso.offsetTop+110;
    dx=x-ex; dy=y-ey;
    r=(dx*dx/108+dy*dy/93<1) ? 1 : Math.sqrt(49*93/(dx*dx*93+dy*dy*108));
    jseye1.style.left= r*dx+24+"px"; jseye1.style.top= r*dy+112+"px";
    ex+=56; dx-=56;
    r=(dx*dx/107+dy*dy/93<1) ? 1 : Math.sqrt(49*93/(dx*dx*93+dy*dy*107));
    jseye2.style.left= r*dx+109+"px"; jseye2.style.top= r*dy+110+"px";
  }
}

// Main
function jseyes() {
  var img;
  var x, y, a=false;

  if (arguments.length==2) {
    x= arguments[0];
    y= arguments[1];
    a= true;
  }

  if (browsertype>0 && browserversion>=5) {
    img= "<div id='jseyeslayer' style='position:relative; z-index:5; width:150px; height:264px; overflow:hidden'>"+
	     "<div id='jseye1' style='position:absolute; left:27px; top:108px; z-index:4; width:13px; height:14px'>"+
	       "<img src='"+jseyeimg+"' width='20' height='20' onClick=\"location.href='"+jseyeslink+"'\">"+
	     "</div>"+
	     "<div id='jseye2' style='position:absolute; left:109px; top:105px; z-index:4; width:13px; height:14px'>"+
	       "<img src='"+jseyeimg+"' width='20' height='20'>"+
	     "</div><div style='position:absolute;z-index:10;'>"+
	     "<img src='"+jseyesimg+"' width='150' height='264'>"+
	 "</div></div>";
    document.write(img);
    jseyeso=jseyesobj('jseyeslayer');
    jseye1=jseyesobj('jseye1');
    jseye2=jseyesobj('jseye2');

    switch (browsertype) {
      case 1:
        document.onmousemove=jseyesmousemoveIE;
	break;
      case 2:
        document.captureEvents(Event.MOUSEMOVE);
	document.onmousemove=jseyesmousemoveNS;
	break;
    }
  }
}


// Mouse move events
function jseyesmousemoveNS(e) {
  jseyesmove(e.pageX, e.pageY);
  //return(false);
}
function jseyesmousemoveIE() {
  jseyesmove(event.clientX+document.body.scrollLeft, event.clientY+document.body.scrollTop);
  //return(false);
}