function showHideDiv(div_id)
{
	var vis = document.getElementById(div_id);
//	alert(vis.style.display);
	if( vis.style.display == 'none' )
	{
		vis.style.display = 'block';
	}
	
	else{
		vis.style.display = 'none';
	}
	
	createCookie(div_id,vis.style.display,25)
}
	
	
function setDisplayFromCookie(div_id)
{
//	alert(readCookie(div_id));
	disp = readCookie(div_id);
	if (disp == null)
	{
		disp = 'none';
	}
	document.getElementById(div_id).style.display = disp;
}

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);
}