//=====================================================================
// dhtmlcentral.com lib function
//=====================================================================
function browserCheck()
{ 
  this.version=navigator.appVersion
  this.agent=navigator.userAgent
  this.isDom=document.getElementById?1:0
  this.isOpera5=this.agent.indexOf("Opera 5")>-1;
  this.isIe5=(this.version.indexOf("MSIE 5")>-1 && this.isDom && !this.isOpera5)?1:0; 
  this.isIe6=(this.version.indexOf("MSIE 6")>-1 && this.isDom && !this.isOpera5)?1:0;
  this.isIe4=(document.all && !this.dom && !this.opera5)?1:0;
  this.isIe=this.isIe4||this.isIe5||this.isIe6;
  this.isMac=this.agent.indexOf("Mac")>-1;
  this.isNN6=(this.isDom && parseInt(this.version) >= 5) ?1:0; 
  this.isNN4=(document.layers && !this.dom)?1:0;
  this.isMod=(this.isIe6||this.isIe5||this.isIe4||this.isNs4||this.isNs6||this.isOpera5||this.isDom);
  return this
}

var browser=browserCheck();