var postfix='_hover';

function _hover() {
	this.mX = 0; this.mY = 0;	this.IT = null;	this.HC = null;
	this.over_label=false; this.over_tooltip=false; this.over_tooltip_content=false;
  this.outtimer=function() {
  	var me=this; setTimeout(function() { if (!me.over_label && !me.over_tooltip && !me.over_tooltip_content) me.out(); },1000);
  }
}

_hover.prototype.move = function(e,O) {
	var hh=this; hh.IT=O; hh.HC = document.getElementById(O.id+postfix); var dw=screen.width, dh=screen.height;
  if (document.width) dw=document.width-10; else if (document.body.clientWidth) dw=document.body.clientWidth;
  if (O.className.indexOf('hover_move')!=-1) {
	  if (e.pageX || e.pageY) { hh.mX=e.pageX; hh.mY=e.pageY; }
  	else if (e.clientX || e.clientY) { hh.mX=e.clientX+document.body.scrollLeft; hh.mY=e.clientY+document.body.scrollTop; }
  } else {
    var mx=(O.className.indexOf('hover_right')==-1?1/2:1);
    var my=(O.className.indexOf('hover_top')==-1?1/2:0);
    var P=getPos(O), w=O.offsetWidth, h=O.offsetHeight; hh.mX=P[0]+mx*w; hh.mY=P[1]+my*h;
  }
  var ax=2, ay=2;
//if (dw<hh.HC.offsetWidth+hh.mX)
   if (dw/2<hh.mX) { hh.mX-=hh.HC.offsetWidth; ax*=-1; }
   if (dh/2<hh.mY) { hh.mY-=hh.HC.offsetHeight; ay*=-1; }
//if (w+hh.mX+ax>dw) hh.mX=dw-w-ax;
//alert(w+" "+hh.mX+" "+ax+" "+dw);
	this.noout=false; if (this.HC!=undefined) if (this.HC.style!=undefined) { hh.HC.style.top = (hh.mY+ay)+'px'; hh.HC.style.left = (this.mX+ax)+'px'; }
}

_hover.prototype.set_fix_pos = function(e,O) {
  var hh=this;
  hh.over_label=true; if (hh.IT && hh.IT!=this) hh.out();
  if (hh.IT!=this) { hh.move(e,O); }
  hh.HC.onmouseover=function() { hh.over_tooltip=true; }
  hh.HC.onmouseout=function() { hh.over_tooltip=false; hh.outtimer(); }
  var children=document.getElementById(O.id+postfix).childNodes;
  for (var cn in children) if (children[cn].nodeName=='A') {
    children[cn].onmouseover=function() { hh.over_tooltip_content=true; }
    children[cn].onmouseout=function() { hh.over_tooltip_content=false; hh.outtimer(); }
  }
}

_hover.prototype.init = function() {
	var hh=this; var A=document.getElementsByClassName( 'hover_move').concat(document.getElementsByClassName('hover_click')).concat(document.getElementsByClassName('hover_fix'));
	for (var i=0; i<A.length; i++) if (!A[i].hover_act) {
	  A[i].hover_act=1;
  	if (!A[i].backupmethods) {
      A[i].mover=A[i].onmouseover;
      A[i].mout=A[i].onmouseout;
      A[i].mmove=A[i].onmousemove;
      A[i].mclk=A[i].onclick;
      A[i].mrel=A[i].onrelease;
      A[i].backupmethods=true; // don't run again (infinite loops are definitely BAD)      
  	}
    if (A[i].className.indexOf('hover_move')!=-1) {
	    A[i].onmousemove = function(e) { if (hh.IT && hh.IT!=this) hh.out(); if (!e) var e = window.event; hh.move(e,this); if (this.mmove) this.mmove();  }
	    A[i].onmouseout = function (e) { hh.out();  if (this.mout) this.mout();  }
    } else if (A[i].className.indexOf('hover_click')!=-1) {
	    A[i].onclick = function(e) { hh.set_fix_pos(e,this);  if (this.mclk) this.mclk();  }
	    A[i].onmouseout = function (e) { hh.over_label=false; hh.outtimer();  if (this.mmove) this.mmove();  }
    } else if (A[i].className.indexOf('hover_fix')!=-1) {
      A[i].onmouseover = function(e) { hh.set_fix_pos(e,this);  if (this.mover) this.mover();  }
	    A[i].onmouseout = function (e) { hh.over_label=false; hh.outtimer();  if (this.mout) this.mout();  }
    }
	}
}


_hover.prototype.out = function() {
  if (this.HC!=undefined) if (this.HC.style!=undefined) {	this.HC.style.top = -10000+'px'; this.HC.style.left = -10000+'px'; } this.IT = null;	this.HC = null;
}


var hover = new _hover();

addEvent(window, 'load', function() {	hover.init(); });