IE9的css hack使用示例

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

background-color:red\0;IE8和IE9都支持；
background-color:blue\9\0; 仅IE9支持；

#element {
color:orange;
}
#element {
color: white; / IE6+7, doesn't work IE8/9 as IE7 /
}
#element {
_color: red; / IE6 /
}
#element {
color: green\0/IE8+9; / IE8+9 /
}
:root #element { color:pk \0/IE9; } / IE9 /