function createCookie(name,value,expires)
{
	var date = new Date();
	date.setDate(date.getDate()+expires);
	document.cookie = name + "=" + value + "; path=/; expires=" + date.toGMTString();
}
function readCookie(name)
{
	var n = 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(n)==0)
			return c.substring(n.length,c.length);
	}
	return null;
}
function removeCookie(name)
{
	document.cookie = name + "=; path=/; expires=Fri, 02-Jan-1970 00:00:00 GMT;"
}