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 ""
	}

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.toGMTString())
}