JavaScript实现简单的下拉菜单 2007-02-02 09:00 <html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>下拉菜单</title><style>.cardbottom {BACKGROUND-COLOR: #99ccff; BORDER-BOTTOM: black 1px solid; BORDER-LEFT: black 1px solid; BORDER-RIGHT: black 1px solid; BORDER-TOP: black 0px solid; FILTER: Alpha(Opacity=80)}</style><script language="javascript" type="text/javascript">function aa(){if(document.getElementById("Layer2").style.display == "none"){document.getElementById("Layer2").style.display ="list-item";document.getElementById("Layer1").innerText="关闭";return;}if(document.getElementById("Layer2").style.display == "list-item"){document.getElementById("Layer2").style.display="none";document.getElementById("Layer1").innerText="打开";return;}}function bb(){if(document.getElementById("Layer4").style.display == "none"){document.getElementById("Layer4").style.display ="list-item";document.getElementById("Layer3").innerText="关闭";return;}if(document.getElementById("Layer4").style.display == "list-item"){document.getElementById("Layer4").style.display="none";document.getElementById("Layer3").innerText="打开";return;}}</script></head><body><div id="Layer1" class="cardbottom" style="width:100px; "onClick="aa()">打开</div><div id="Layer2" class="cardbottom" style="width:100px; " style="display:none;" > 选项一<br> 选项二<br> 选项三</div><div id="Layer3" class="cardbottom" style="width:100px; " onClick="bb()">打开</div><div id="Layer4" class="cardbottom" style="width:100px; "style="display:none "> 选项一<br> 选项二<br> 选项三</div></body></html>