var isW3C = (document.getElementById) ? true : false
var isAll = (document.all) ? true : false

function showhidelayer(elemID) {
	var elem = (isW3C) ? document.getElementById(elemID) : ((isAll) ? document.all[elemID] : null);

    if (typeof elem.className == "string") {
        if (elem.className == 'closed'){
			elem.className = '';
			setCookie(elemID,elemID , 1);
		} else {
			elem.className = 'closed';
			setCookie(elemID, "", -1);
		}
    }
}
function showlayer(elemID) {
	var elem = (isW3C) ? document.getElementById(elemID) : ((isAll) ? document.all[elemID] : null);

    if (typeof elem.className == "string") {        
		elem.className = '';
		setCookie(elemID, elemID, 1);		 
    }
}
function hidelayer(elemID) {
	var elem = (isW3C) ? document.getElementById(elemID) : ((isAll) ? document.all[elemID] : null);

    if (typeof elem.className == "string") {        
		elem.className = 'closed';
		setCookie(elemID, "", -1);		 
    }
}
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())
}

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 ""
}