function tips_init(){
	var i; 
	window.places=document.getElementsByTagName('var');
	window.tips=document.getElementsByTagName('dfn');
	for (i = 0; i < window.places.length; i++) {
		window.places[i].name=i;
		window.places[i].onmouseover=function(){window.tips[this.name].style.display='block';this.style.zIndex=1000;};
		window.places[i].onmouseout =function(){window.tips[this.name].style.display='none';this.style.zIndex=0;};
	}
	for (i = 0; i < window.tips.length; i++) {
		if (window.places[i]) window.places[i].appendChild(window.tips[i]);
	}
	return true;
}


window.onload=function(){tips_init()}