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<!-- 把下列代码加到<body>区域中 --> <style> #sub1, #sub2, #sub3 { position: absolute; links: 480px; Sichtbarkeit: verborgen; z-index: 3 } </style> <SCRIPT LANGUAGE="JavaScript"> <!-- Begin catnumber = 3 offset = 150 performOnchange = false if (document.all) { docObj = "document.all." styleObj = ".style" } else { docObj = "document." styleObj = "" } function openselect(subcat) { popupselect = eval(docObj + subcat + styleObj) popupselect.visibility = "visible" } function closeselect(submenu,subcat){ popupselect = eval(docObj + subcat + styleObj) if (submenu .selectedIndex != 0) { popupselect.visibility = "hidden" numchoice = submenu.selectedIndex choice = submenu[ numchoice].value subcategory.value = choice submenu.selectedIndex = 0 } } function lock() { performOnchange = false } function unlock () { performOnchange = true } function selectSub(cat) { for (i=1; i <= catnumber; i++) { subcat = "sub" + i popupselect = eval(docObj + subcat + styleObj) popupselect.visibility = "hidden " } if (performOnchange == true) {letsopen = "sub" + cat.selectedIndex if (letsopen == "sub0") { Alert("Keine Kategorie ausgewählt") choice = "- subcategory -" subcategory.value = choice cat .focus() } else { openselect(letsopen) lock() } } } // Ende --> </script> <div align="center"> <span id="sub1"> <select name="subannounce" onchange="closeselect(this,'sub1')"> <option selected value="">- 综合性站点 - <option value="新浪网">新浪网 <option value="搜狐">搜狐 <option value= "网易">网易 </select> </span> <span id="sub2"> <select name="subarts" onchange="closeselect(this,'sub2')"> <option selected value="">-艺术性站点 - <option value="chinamp3">chinamp3 <option value="通海微雕">通海微雕 <option value="painting">painting </select> </span> <span id="sub3"> <select name="subsoftware" onchange="closeselect(this,'sub3')"> <option selected value="">- 体育类站点 - <option value="中国足球网">中国足球网 <option value="中国篮球网">中国篮球网 <option value="NBA">NBA <option value="新浪体育">新浪体育 </select> </span> <select name="categoria" onmouseover="unlock()" onchange ="selectSub(this)"> <option selected value="">-- 选择站点类型 -- <option value="综合性站点">综合性站点 <option value="艺术性站点">艺术术性站点 <option value ="体育类站点">体育类站点 </select><br> <input type="text" name="subcategory" readonly="readonly" value="- 选择具体站点 -"> </div>
