//  <script language="javascript" src="my-java.js" type="text/javascript"></script>
//  <script language="javascript">
//  <!--
//    ebwrite();
//  // -->
//  </script>


// Defaults
var ebnumdots= 1;
var ebimg= "images/HeliCursor.gif";
var ebHTML= null;
var ebwidth= 112;
var ebheight= 38;
var ebseglength= 20;
var ebspringk= 10;
var ebmass= 10;
var ebgravity= -50;
var ebresistance= 100;
var ebbounce= 0.75;
var ebzindex= 5;

// Private variables
var ebmousex=0, ebmousey=0;
var ebdeltat=0.02;
var ebdots= new Array();

// 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 ebobj(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 object
function ebmove(o, x, y) {
  if (!o) return;
  if (o.style) {
    o.style.left= x+"px";
    o.style.top= y+"px";
  } else {
    o.left= x;
    o.top= y;
  }
}

// Create dots
function ebwrite() {
  var i, img;
  var x=ebwidth/2, y=ebheight/2;

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

  if (browsertype<0 || browserversion<5) return;

  img= "";
  ebdots[0]= new ebdot(x, y);
  for (i=1; i<=ebnumdots; i++) {
    y+= ebseglength;
    img+= "<div id='ebdot"+i+"' style='position:absolute; left:"+x+"; top:"+y+"; "+
            "height:"+ebheight+"; width:"+ebwidth+"; z-index:"+ebzindex+"'>"+
	    (ebHTML ? ebHTML :
	      "<img src='"+ebimg+"' height='"+ebheight+"' width='"+ebwidth+"' border='0'>")+
	  "</div>";
    ebdots[i]= new ebdot(x, y);
  }
  document.write(img);

  for (i=1; i<=ebnumdots; i++) {
    ebdots[i].obj= ebobj("ebdot"+i);
  }

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

  setInterval("ebanimate()", 1000*ebdeltat);
}

// Parameters of one dot
function ebdot(x, y) {
  this.x= x;
  this.y= y;
  this.dx= 0;
  this.dy= 0;
  this.obj= null; // unknown
}

// Capture mouse position
function ebmousemoveNS(e) {
  ebmousex= e.pageX;
  ebmousey= e.pageY;
  return(true);
}
function ebmousemoveIE() {
  ebmousex= window.event.clientX + document.body.scrollLeft;
  ebmousey= window.event.clientY + document.body.scrollTop;
}

// Animation
function ebanimate() {

  // Vector object
  function ebvec(X, Y) {
    this.x = X;
    this.y = Y;
  }

  // Add force in x and y direction to spring for ebdot[i] on ebdot[j]
  function ebspring(i, j, spring) {
    var dx= ebdots[i].x-ebdots[j].x;
    var dy= ebdots[i].y-ebdots[j].y;
    var len= Math.sqrt(dx*dx+dy*dy);
    if (len>ebseglength) {
      var springF= ebspringk*(len-ebseglength);
      spring.x+= (dx/len)*springF;
      spring.y+= (dy/len)*springF;
    }
  }

  var winleft= browsertype==2 ? window.scrollX : document.body.scrollLeft;
  var wintop= browsertype==2 ? window.scrollY : document.body.scrollTop;
  var winwidth= browsertype==2 ? window.innerWidth-14 : document.body.clientWidth;
  var winheight= browsertype==2 ? window.innerHeight : document.body.clientHeight;

  ebdots[0].x= ebmousex-winleft;
  ebdots[0].y= ebmousey-wintop;
  for (i=1; i<=ebnumdots; i++) {
    var spring= new ebvec(0, 0);
    ebspring(i-1, i, spring);
    if (i<ebnumdots) {
      ebspring(i+1, i, spring);
    }
    var resist= new ebvec(-ebdots[i].dx*ebresistance, -ebdots[i].dy*ebresistance);
    var accel= new ebvec((spring.x+resist.x)/ebmass, (spring.y+resist.y)/ebmass+ebgravity);
    ebdots[i].dx+= (ebdeltat*accel.x);
    ebdots[i].dy+= (ebdeltat*accel.y);
    ebdots[i].x+= ebdots[i].dx;
    ebdots[i].y+= ebdots[i].dy;
    if (ebdots[i].y>=winheight-ebheight/2-1) {
      if (ebdots[i].dy>0) {
	ebdots[i].dy= -ebbounce*ebdots[i].dy;
      }
      ebdots[i].y= winheight-ebheight/2-1;
    }
    if (ebdots[i].y<ebheight/2) {
      if (ebdots[i].dy<0) {
	ebdots[i].dy= -ebbounce*ebdots[i].dy;
      }
      ebdots[i].y= ebheight/2;
    }
    if (ebdots[i].x>=winwidth-ebwidth/2) {
      if (ebdots[i].dx>0) {
	ebdots[i].dx= -ebbounce*ebdots[i].dx;
      }
      ebdots[i].x= winwidth-ebwidth/2-1;
    }
    if (ebdots[i].x<ebwidth/2) {
      if (ebdots[i].dx<0) {
	ebdots[i].dx= -ebbounce*ebdots[i].dx;
      }
      ebdots[i].x= ebwidth/2;
    }
    ebmove(ebdots[i].obj, winleft+ebdots[i].x-ebwidth/2, wintop+ebdots[i].y-ebheight/2);
  }
}

function MDM_openWindow(theURL,winName) { 
	var _W=window.open(theURL,winName, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=no, width=' + window.screen.availWidth * .75 + ', height=' + window.screen.availHeight * .5 + ', screenX=150, screenY=150, top=150, left=150');
	_W.focus();
	_W.moveTo(50,50); 
}

function MDM_openFullWindow(theURL,winName) { 
	var _W=window.open(theURL,winName, 'toolbar=yes, location=yes, directories=yes, status=yes, menubar=yes, scrollbars=yes, resizable=yes, copyhistory=no, width=' + window.screen.availWidth * .75 + ', height=' + window.screen.availHeight * .5 + ', screenX=150, screenY=150, top=150, left=150');
	_W.focus();
	_W.moveTo(50,50); 
}