function toggleCollapse (collapsibleHeader, collapsibleContent){
	var currentStatus = collapsibleHeader.getAttribute('class').indexOf('collapsed')==-1 ? 'expanded' : 'collapsed';;
	if (currentStatus == 'collapsed'){
		collapsibleHeader.setAttribute('class',collapsibleHeader.getAttribute('class').replace(/collapsed/, ''));
		collapsibleContent.setAttribute('class',collapsibleContent.getAttribute('class').replace(/collapsed-block/, ''));
	}
	else{
		collapsibleHeader.setAttribute('class',collapsibleHeader.getAttribute('class') + ' collapsed');
		collapsibleContent.setAttribute('class',collapsibleContent.getAttribute('class') + ' collapsed-block');
	}
}

function writeEmailAddresses()
{
	// html format: <a name="e" class="email">londonpi<span class="at"></span>drugaddictsanonymous.org.uk</a>
	var eArray = document.getElementsByName('e');
	
	for (var i=0; i < eArray.length; i++) {

		var eAdd = eArray[i].innerHTML.split(/<.+?>.+?>/);
		
		var emailAddress = eAdd[0] + '@' + eAdd[1];
		
		eArray[i].innerHTML = emailAddress;				
		if (eArray[i].tagName.toLowerCase() == 'a'){
			eArray[i].setAttribute('href','mailto:' + emailAddress);
		}
	}
}