Bootstrap
.row-fluid .span12{
width: 100%;
*width: 99.94680851063829%;
}
.row-fluid .span11 {
width: 91.48936170212765%;
*width: 91.43617021276594%;
}
.row-fluid .span10 {
width: 82.97872340425532%;
*width: 82.92553191489361%;
}
上述的百分比是如何计算的，为什么IE的宽度会有所不同
