var csstype="inline"
var mac_css='.pageManu ul li:hover.conteact, .pageManu ul li#conteact{background:url(images/sprite.png) -576px -496px; }' 
var pc_css='.pageManu ul li:hover.conteact, .pageManu ul li#conteact{background:url(images/sprite.png) -571px -496px; }' 
  
var mactest=navigator.userAgent.indexOf("Mac")!=-1
if (csstype=="inline"){
document.write('<style type="text/css">')
if (mactest)
document.write(mac_css)
else
document.write(pc_css)
document.write('</style>')
}