function setCookie(c_name,value,expiredays)
{
	if (!document.cookie) { return ; }
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie=c_name+ "=" +escape(value)+((expiredays==null) ? "" : ";expires="+exdate.toGMTString())+"; path=/";
}

function getCookie(c_name)
{
	if (!document.cookie) { return ; }
	if (document.cookie.length>0)
	{
		c_start=document.cookie.indexOf(c_name + "=");
		if (c_start!=-1)
		{ 
			c_start=c_start + c_name.length+1 ;
			c_end=document.cookie.indexOf(";",c_start);
			if (c_end==-1) { c_end=document.cookie.length ; }
			return unescape(document.cookie.substring(c_start,c_end));
		} 
	}
	return "";
}