CSS条件注释
gt /Greater than/大于/<!--[if gt IE 5.5]> gte /Greater than or equal to/大于等于/<!--[if gte IE 5.5]> lt /Less than/小于/<!--[if lt IE 5.5]> lte /Less than or equal to/小于等于/<!--[if lte IE 5.5]> ! /Note/不等于/<!--[if !IE 5.5]> 对于HTML的注释,例如:<!--[if !IE]><!-->