function isDOMcompliant(){return document.getElementById && document.getElementsByTagName;}

var DOM = isDOMcompliant();
var Netscape6 = Mozilla = (navigator.appName == "Netscape") && DOM;
var Netscape7 = navigator.userAgent.indexOf("Netscape/7") >= 0;
var Opera5 = window.opera && DOM;
var Opera6 = Opera5 && window.print;
var Opera7 = Opera5 && navigator.userAgent.indexOf("Opera 7") >= 0;
var IE = document.all && !Opera5;
var Firefox = navigator.userAgent.indexOf("Firefox") >= 0;


function ChLiClass(ElemID)
{ result = false;
  if (!DOM) { return result; } 
  for (i=1;i<121;i++){
	 elem = document.getElementById('li'+i);  
 	 if (null==elem) { if ( i > 121) break;} else if ('selecton'==elem.className) elem.className = '';
  }

 elem = document.getElementById('li'+ElemID);  
 if (null!= elem) {elem.className = 'selecton'; result=true}
 return result;
}