function HideButterfly()
{
	var butterfly = document.getElementById("leftButterfly");
	var menu = document.getElementById("memberaccess");
	if( butterfly != null)
	{
		butterfly.style.display = "none";
		menu.style.display = "inline";
	}		
}

function SelectTab(tabname)
{
	var tab = document.getElementById(tabname);
    if( tab != null)
        tab.className  = "active";
		
	// if an about tab comes through, activate the parent	
	if( tabname.indexOf("about") >-1 && tabname!="tababout")
	{
		document.getElementById("tababout").className = "active";;
		document.getElementById("aboutnav").style.display="block";
	}

}


function AutofitIframe(id){
  //find the height of the internal page
  var the_height=document.getElementById(id).contentWindow.document.body.scrollHeight;

  //change the height of the iframe
  document.getElementById(id).height=the_height + 100;
} 


/*  The create/read/erase cookie funtions are use to keep track of
	logged in users email address */

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);
}