function changest(n) {
	
	var state=document.getElementById("spanop_"+n).style.display;
	if(state=="")
		hide_submenu(n);
	else
		show_submenu(n);
}

function ChangeState(i){
    state=getCookie("menu_"+i);
    if(state==1)
        show_submenu(i);
    else
        hide_submenu(i);
}

function show_submenu(n){
	document.getElementById("img_"+n).src="/images/minus.gif";
      document.getElementById("spanop_"+n).style.display="";
	setCookie('menu_'+n,1,30);
}

function hide_submenu(n){
	document.getElementById("spanop_"+n).style.display = "none";	 
      document.getElementById("img_"+n).src="/images/plus.gif";
	setCookie('menu_'+n,0,30);
}


function setCookie(name, value, exp, path, domain, secure) {
         if (!exp)
            var exp=1;
         var expires = new Date ();
         expires.setTime(expires.getTime() + (24 * 3600 * 1000 * exp));
         var path="/";
         var curCookie = name + "=" + escape(value) +
                 ((expires) ? "; expires=" + expires.toGMTString() : "") +
                 ((path) ? "; path=" + path : "") +
                 ((domain) ? "; domain=" + domain : "") +
                 ((secure) ? "; secure" : "")
         if ((name + "=" + escape(value)).length <= 4000)
                 document.cookie = curCookie
 }
 
function getCookie(name) {
         var prefix = name + "="
         var cookieStartIndex = document.cookie.indexOf(prefix)
         if (cookieStartIndex == -1)
                 return null
         var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length)
         if (cookieEndIndex == -1)
                 cookieEndIndex = document.cookie.length
         return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex))
 }