Question

overflow:hidden;和boverflow:hidden;的区别,为什么有的人都写上

<div class="bznav"><!--[if !IE]>-bznav-<![endif]-->
<div style="position:absolute;">
<div class="bznav1">
<div class="bznav1s link12"><a href="#" target="_blank">无痛人流</a></div>
<div class="bznav1z">
<ul>
<li><a href="#" target="_blank">人流术前 </a></li>
<li><a href="#" target="_blank">人流术后 </a></li>
<li><a href="#" target="_blank">人流时间 </a></li>
<li><a href="#" target="_blank">人流价格 </a></li>
<li><a href="#" target="_blank">宫外孕 </a></li>
<li><a href="#" target="_blank">药物人流 </a></li>
<li><a href="#" target="_blank">早孕诊断 </a></li>
<li><a href="#" target="_blank">上环取环 </a></li>
</ul>
</div>
<div class="bznav1x"></div>
</div>

.bznav{ width:981px; height:104px; float:left; padding:0px 1px 0px 1px; background:url(../images/rlsy06.jpg) no-repeat 1px top; margin-top:3px; display:inline; overflow:hidden;}

.bznav1{ width:159px; float:left; margin:7px 0px 0px 4px; display:inline;}
.bznav1s{ width:159px; height:31px; line-height:31px; text-align:center; float:left; background:url(../images/rlsy123.png) no-repeat left top; padding-bottom:3px;}
.bznav1z{ width:159px; height:42px; float:left; overflow:hidden; boverflow:hidden;z-index:999999; position:relative; }
.bznav1z ul{ width:159px; float:left; background:url(../images/rlsy124.png) repeat-y left top; }
.bznav1z li{ width:79px; height:21px; line-height:21px; text-align:center; float:left; }
.bznav1z li a{color:#656565; }
.bznav1z li a:hover{color:#656565; text-decoration:underline; }
.bznav1x{ width:159px; height:11px; float:left; background:url(../images/rlsy125.png) no-repeat left top;z-index:999999; }

Answer 1

有boverflow:hidden；吗？