css背景自适应文字宽度按钮
a.bt_1,a.bt_2{ margin:0 3px; cursor:pointer; font-weight:normal; font-size:12px; text-decoration:none}a.bt_1,a.bt_1 span,a.bt_1:hover,a.bt_1:hover span,a.bt_2,a.bt_2 span,a.bt_2:hover,a.bt_2:hover span{ background:url(../images/bt_1.gif) no-repeat top left; padding-left:15px; height:24px; display:inline-block; text-indent:0; line-height:23px; color:#FFF;}a.bt_2,a.bt_2 span,a.bt_2:hover,a.bt_2:hover span{ background:url(../images/bt_2.gif) no-repeat top left; color:#000;}a.bt_1 span,a.bt_2 span,a.handle_bt span{background-position:top right; padding:0; padding-right:12px;}a.bt_1:hover,a.bt_2:hover,a.handle_bt:hover{background-position:bottom left; text-decoration:none; color:#000000;}a.bt_1:hover span,a.bt_2:hover span,a.handle_bt:hover span{background-position:bottom right; padding:0; padding-right:12px;}以下是引用的代码，用a标签代替按钮
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