css 兼容

background-color:red\0;  /* ie 8/9*/
background-color:blue\9\0;  /* ie 9*/
*background-color:#dddd00;  /* ie 7*/
_background-color:#CDCDCD;  /* ie 6*/


webkit内核的hack

@media screen and (-webkit-min-device-pixel-ratio:0) {
.select{color:#f00}
}

火狐

@-moz-document url-prefix()
{
    .select{color:#f00}
}