.eq {
color:#f00; /*标准浏览器*/
color:#f30\0; /*IE8,IE9,opera*/
*color:#c00; /*IE7及IE6*/
_color:#600; /*IE6*/
}

---

:root .eq {
color:#a00; /*IE9+*/
}

---

@media all and (-webkit-min-device-pixel-ratio:10000), not all and (-webkit-min-device-pixel-ratio:0){
.eq { color:#450; } /*opera专属*/
}

---

@media screen and (-webkit-min-device-pixel-ratio:0){
.eq { color:#879; } /*chrome, safari专属*/
}

---

@-moz-document url-prefix(){
.eq { color:#4dd; } /*firefox专属*/
}

JQuery.com
http://code.jquery.com/jquery-latest.js
http://code.jquery.com/jquery-1.4.2.js
http://code.jquery.com/jquery-1.5.2.js
http://code.jquery.com/jquery-1.6.2.js
http://code.jquery.com/jquery-1.7.2.js
http://code.jquery.com/jquery-1.8.3.js

---

Microsoft CDN
http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.3.2.min.js
http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.4.3.min.js
http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.5.2.min.js
http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.2.min.js
http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.7.2.min.js
http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.3.min.js

---

Google CDN
http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js