有什么问题请到评论中发表<br> <!--# 特效来源：http://www.mb5u.com/jscode --> <!--把如下代码加入<body>区域中--> <script language="javascript"> function aClass(aData, aValue, aText) { if (aClass.arguments.length < 3) alert("传入的参数错误！") else { this.Data = aData; this.Value = aValue; this.Text = aText; } } function chgDnCombobox(aSrc, aDes, aClass, aRemain){ if (chgDnCombobox.arguments.length < 3) alert("传入的参数错误！") else if (aSrc.type != "select-one") alert("传入的参数错误！") else if (aClass == null) alert("aClass未定义错误！") else { if (aRemain==null) aRemain = 1; chgDnComboboxItem(aSrc.options[aSrc.selectedIndex].value, aDes, aClass, aRemain); } } function chgDnComboboxItem(aValue, aDes, aClass, aRemain){ if (chgDnComboboxItem.arguments.length<3) alert("参数传入错误！") else if (aClass==null) alert("错误！aClass没有定义！") else{ if (aRemain==null) aRemain = 1; deleteAllComboboxItem(aDes, aRemain); for (var i=0; i<aClass.length; i++) if (aClass[i].Data==aValue) /* check aClass[i].Data */ if (aClass[i].Data!="") addComboboxItem(aDes, aClass[i].Text, aClass[i].Value); } } function deleteAllComboboxItem(aList, aRemain) { for (var i=aList.options.length; i > aRemain-1; i--) aList.options[i] = null; } function addComboboxItem(aList, aText, aValue) { var aOption = new Option(aText, aValue); eval("aList.options[aList.options.length]=aOption"); } </script> <table width="300" border="0" cellspacing="0" cellpadding="5"> <tr> <form name="myform" onSubmit="return noerror(myform)" method="post" action="youraction_script"><td height="16" valign="top" bgcolor="#CCCC99"> <div align="left"><span class="title">显示:</span> <select name="CountryGroup" size=1 onChange='change_area(document.myform)'> <option value="国内">国内</option> <option value="国外">国外</option> </select> <select name="City" size=1> <option value="北京">北京</option> <option value="广东">广东</option> <option value="广西">广西</option> <option value="上海">上海</option> <option value="福建">福建</option> <option value="天津">天津</option> <option value="湖南">湖南</option> <option value="湖北">湖北</option> <option value="浙江">浙江</option> <option value="河北">河北</option> <option value="山东">山东</option> <option value="四川">四川</option> <option value="安徽">安徽</option> <option value="辽宁">辽宁</option> <option value="江苏">江苏</option> <option value="甘肃">甘肃</option> <option value="青海">青海</option> <option value="江西">江西</option> <option value="宁夏">宁夏</option> <option value="山西">山西</option> <option value="云南">云南</option> <option value="吉林">吉林</option> <option value="河南">河南</option> <option value="陕西">陕西</option> <option v</body></html>
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