if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ //test for MSIE x.x;
 var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
 if (ieversion>=8)
  document.write('')
 else if (ieversion>=7)
  document.write('')
 else if (ieversion>=6)
  document.write('<link rel="stylesheet" type="text/css" href="https://www.zweigwhite.com/skins/s2/ie6.css">')
 else if (ieversion>=5)
  document.write('<link rel="stylesheet" type="text/css" href="https://www.zweigwhite.com/skins/s2/ie6.css">')
}
else
 document.write('')