function writeCookie(name, value, expires)
{
	if(expires)
	{
		var a = new Date();
		a = new Date(a.getTime() +e);
		document.cookie = name+'='+value+'; expires='+a.toGMTString()+';';
	}
	else
		document.cookie = name+'='+value+';';
}

function readCookie(name)
{
	a = document.cookie;
 	res = '';
 	while(a != '')
 	{
  		while(a.substr(0,1) == ' ')
  		{
  			a = a.substr(1,a.length);
  		}
		
		cookiename = a.substring(0,a.indexOf('='));
		
		if(a.indexOf(';') != -1)
		{
			cookiewert = a.substring(a.indexOf('=')+1,a.indexOf(';'));
		}
		else
		{
			cookiewert = a.substr(a.indexOf('=')+1,a.length);
		}
		
		if(name == cookiename)
		{
			res = cookiewert;
		}
		 
		i = a.indexOf(';')+1;
		
		if(i == 0)
		{
			i = a.length
		}
		
		a = a.substring(i,a.length);
 	}
	return(res)
}

function deleteCookie(n)
{
	document.cookie = n+'=; expires=Thu, 01-Jan-70 00:00:01 GMT;';
}