// JavaScript Document
// Written by Phil Whitehurst
// September 2008
// Code for collapsing / expanding sections of web pages with Spry XML data in.
//

function togglevisibility (postid) { 

 
var whichpost = document.getElementById(postid); 
if (whichpost.className=="collapseblock") { 
whichpost.className="expandblock"; 


Spry.Utils.removeClassName(postid + "O","show"); 
Spry.Utils.addClassName(postid + "O","hide");

Spry.Utils.removeClassName(postid + "C","hide");
Spry.Utils.addClassName(postid + "C","show");
createCookie(postid,"expandblock",30);

} 
else { 
whichpost.className="collapseblock"; 


Spry.Utils.removeClassName(postid + "C","show"); 
Spry.Utils.addClassName(postid + "C","hide");

Spry.Utils.removeClassName(postid + "O","hide");
Spry.Utils.addClassName(postid + "O","show");

createCookie(postid,"collapseblock",30);
} 
} 
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}