有什么问题请到评论中发表<br> <!--# 特效来源：http://www.mb5u.com/jscode --> <!-- 把下列代码加到<body>区域中 --> <style> #sub1, #sub2, #sub3 { position: absolute; left: 480px; visibility: hidden; 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(\"No category selected\") choice = \"- subcategory -\" subcategory.value = choice cat.focus() } else { openselect(letsopen) lock() } } } // End --> </script> <div align=\"left\"> <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>
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