div css implements vertical centering compatible with Firefox and IE6_html/css_WEB-ITnose

In Firefox, you can use display: table-cell; vertical-align: middle; to achieve vertical centering of divs, but in IE6, you need to use the characteristics of CSS in IE6 to achieve vertical centering. In order to achieve vertical centering compatible with Firefox and IE6, you also need to use the !important tag. Firefox supports the !important tag, while IE6 ignores the !important tag, so you can use the !important tag to distinguish Firefox and IE6. " >
                                                                   Firefox only

                   

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Vertically centered, IE6 only

                                                                lt;/div>