/*
	some basic cookie handling
*/
function getCookie(c_name){
	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 null;
}
function setCookie(c_name,value,expiredays){
	var exdate=new Date();
	exdate.setDate(exdate.getDate()+expiredays);
	document.cookie = c_name + "=" + escape(value) + ( (expiredays==null)?"":";expires="+exdate ) + ";path=/";
}
function deleteCookie(c_name){
	var exdate = new Date ( );  // current date & time
	exdate.setDate(exdate.getDate()-1);
	document.cookie = c_name + "=; expires=" + exdate;
}