window.onload=function(){

function PopupView(id) { 
if (!document.getElementById) return; 

var node = document.getElementById(id); 
if (node) PopupView.initializer.call(node.childNodes); 
}

PopupView.initializer = function() { 
for (var i = 0, I = this.length; i < I; i++) { 
PopupView.switcher.call(this[i].childNodes, 'none'); 

this[i].onmouseover = function() { 
PopupView.switcher.call(this.childNodes, 'block'); 
}

this[i].onmouseout = function() { 
PopupView.switcher.call(this.childNodes, 'none'); 
}
}
}

PopupView.switcher = function(displayValue) { 
for (var i = 0, I = this.length; i < I; i++) 
if (this[i].nodeName.match(/[OU]L/)) { 
this[i].style.display = displayValue; 
this[i].style.position = 'absolute'; 
}
}


new PopupView('gnavi');

}