| ie6 | ie7 | ie8 | ie9 | ff | ch | sf | op | |
| 默認高度 | 22px | 22px | 19px | 20px | 19px | 19px | ||
| height | F | T | T | T | T | T | F | T |
| padding | F | F | T | T | T | T | F | T |
| line-height | F | F | F | F | F | F | T | F |
| 文字垂直居中 | T | T | T | F | F | T | T | T |
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