// Modern Combo Box  Script
// copyright Stephen Chapman, 18th October 2008
// you may copy this script provided that you retain the copyright notice
// you should not need to alter the below code

function combo(id,h,l) {
var self = this; 
self.h = h; 
self.l = l; 
self.inp = document.getElementById(id); 
self.hasfocus = false; 
self.sel = -1; 
self.ul = self.inp.nextSibling; 
while (self.ul.nodeType == 3) 
self.ul = self.ul.nextSibling; 

self.ul.onmouseover = function() {
self.ul.className = '';
}; 

self.ul.onmouseout = function() {
self.ul.className = 'focused'; 
if (!self.hasfocus) self.ul.style.display = 'none';
}; 

self.list = self.ul.getElementsByTagName('li'); 
for (var i=self.list.length - 1; i >= 0; i--) {
	self.list[i].onclick = function() {
		self.inp.value = this.firstChild.data;  
		self.rset(self);
	}
} 
self.inp.onfocus = function() {
self.ul.style.display = 'block'; 
self.ul.className = 'focused'; 
self.hasfocus = true; 
self.sel = -1;
}; 

self.inp.onblur = function() {
if(self.ul.className=='focused') {
	self.rset(self);
} 
self.ul.className = ''; 
self.hasfocus = false;
}; 

self.inp.onkeyup = function(e) {
var k = (e)? e.keyCode : event.keyCode; 
if (k == 40 || k == 13) {
	if (self.sel == self.list.length-1) {
		self.list[self.sel].style.backgroundColor = self.l; 
		self.sel = -1;
	}
	if (self.sel > -1) 
		self.list[self.sel].style.backgroundColor = self.l;

	self.inp.value = self.list[++self.sel].firstChild.data; 
	self.list[self.sel].style.backgroundColor = self.h;
} else if (k == 38 && self.sel > 0) {
	self.list[self.sel].style.backgroundColor = self.l; 
	self.inp.value = self.list[--self.sel].firstChild.data; 
	self.list[self.sel].style.backgroundColor = self.h;
	}
	return false;
	};} 

combo.prototype.rset = function(self) {
self.ul.style.display = 'none'; 
self.sel = -1; 
for (var i=self.list.length - 1; i >= 0; i--) {
	self.list[i].style.backgroundColor = self.l;
}

return false;
};