css文字垂直居中显示，li垂直居中

[size=medium]笨办法：填充多高距离，使其看起来居中显示[/size]

<li url="/lottery/index.htm" class="infoBtn swapImage fucai" style="background-image: url('/images/zyt/wlbtysh_btn.png');">
     <hr style="height:23px;border:0px;" />未来宝卡特约商户查询
</li>

[color=red]主要是：line-height，vertical-align对此表情不支持，text-align支持水平居中[/color]

jQuery("li").css({
			"width" : "419",
			"height" : "91",
			"border" : "0",
			"vertical-align" : "middle",
			"font-size" : "22px",
			"color" : "white",
			"line-height" : "3.5"
		}).addClass("text_center");