声明:反对发展私家车,路上太堵了!饭前一贴,下午该开工了,哈<body>
<SELECT ID="oSelect" NAME="Cars">
<OPTION VALUE="0" SELECTED><-- 请选择 -->
<OPTION VALUE="1">宝马
<OPTION VALUE="2">保时捷
<OPTION VALUE="3">奔驰
</SELECT>
<INPUT TYPE=checkbox ID="chkCheap">看看便宜的!
<script language="JavaScript">
<!--
document.all.chkCheap.onclick = function ()
{
if (this.checked)
{
var optionsCollection = document.all.oSelect.options
optionsCollection[optionsCollection.length] = new Option("夏利",4);
optionsCollection[optionsCollection.length] = new Option("富康",5);
}
else
{
if (document.all.oSelect.selectedIndex > document.all.oSelect.options.length - 3)
{
document.all.oSelect.selectedIndex = 0;
}
document.all.oSelect.options.length = 4;
}
};
//-->
</script>
</body>
<SELECT ID="oSelect" NAME="Cars">
<OPTION VALUE="0" SELECTED><-- 请选择 -->
<OPTION VALUE="1">宝马
<OPTION VALUE="2">保时捷
<OPTION VALUE="3">奔驰
</SELECT>
<INPUT TYPE=checkbox ID="chkCheap">看看便宜的!
<script language="JavaScript">
<!--
document.all.chkCheap.onclick = function ()
{
if (this.checked)
{
var optionsCollection = document.all.oSelect.options
optionsCollection[optionsCollection.length] = new Option("夏利",4);
optionsCollection[optionsCollection.length] = new Option("富康",5);
}
else
{
if (document.all.oSelect.selectedIndex > document.all.oSelect.options.length - 3)
{
document.all.oSelect.selectedIndex = 0;
}
document.all.oSelect.options.length = 4;
}
};
//-->
</script>
</body>
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head><body>
<SELECT ID="oSelect" NAME="Cars">
<OPTION VALUE="0" SELECTED><-- 请选择 -->
<OPTION VALUE="1">宝马
<OPTION VALUE="2">保时捷
<OPTION VALUE="3">奔驰
<OPTION VALUE="4">夏利
<OPTION VALUE="5">富康
</SELECT>
<INPUT TYPE=checkbox ID="chkExpensive">不买最好的,就买最贵的!
<script language="JavaScript">
<!--
var chkFlag = document.getElementById("chkExpensive");
chkFlag.onclick = function ()
{
var oSelect = document.getElementById("oSelect");
if (this.checked)
{
if (document.all.oSelect.selectedIndex > document.all.oSelect.options.length - 3)
{
document.all.oSelect.selectedIndex = 0;
} document.all.oSelect.options.length = 4;
}
else
{
var optionsCollection = document.getElementById("oSelect").options
optionsCollection[optionsCollection.length] = new Option("夏利",4);
optionsCollection[optionsCollection.length] = new Option("富康",5);
}
};
//-->
</script>
</body>
</html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
</head><body>
<SELECT ID="oCar">
<OPTION VALUE="0" SELECTED><-- 请选择 -->
<OPTION VALUE="1">宝马
<OPTION VALUE="2">保时捷
<OPTION VALUE="3">奔驰
<OPTION VALUE="4">夏利
<OPTION VALUE="5">富康
</SELECT>
<INPUT TYPE=checkbox ID="chkExpensive">不买最好的,就买最贵的!<br><SELECT ID="oFood">
<OPTION VALUE="0" SELECTED><-- 请选择 -->
<OPTION VALUE="1">苹果
<OPTION VALUE="2">鸭梨
<OPTION VALUE="3">红烧肉
<OPTION VALUE="4">肘子
<OPTION VALUE="5">排骨
</SELECT>
<INPUT TYPE=checkbox ID="chkNoMeat">素食主义者!<br><SELECT ID="oText">
<OPTION VALUE="0" SELECTED><-- 请选择 -->
<OPTION VALUE="1">春
<OPTION VALUE="2">夏
<OPTION VALUE="3">秋
<OPTION VALUE="4">冬
<OPTION VALUE="5">梅
<OPTION VALUE="5">兰
<OPTION VALUE="5">竹
<OPTION VALUE="5">菊
</SELECT>
<INPUT TYPE=checkbox ID="chkSeason">四季!<br><script language="JavaScript">
<!--
// 一个对象加工方法,为给定的 checkBoxId 动态添加属性和方法。
function RebuildCheckBoxControlor(checkBoxId, selectId, removeAmountInTheEnd)
{
var controlor = document.getElementById(checkBoxId);
controlor.selectList = document.getElementById(selectId)
// 先保存好,后面备用。
controlor.selectListBackup = controlor.selectList.cloneNode(true);
controlor.onclick = function()
{
ChangeList(this,removeAmountInTheEnd);
}
}function ChangeList(givenCtrl,removeAmountInTheEnd)
{
var oSelect = givenCtrl.selectList;
if (givenCtrl.checked)
{
if (oSelect.selectedIndex > (oSelect.options.length - 1 - removeAmountInTheEnd))
{
oSelect.selectedIndex = 0;
} oSelect.options.length -= removeAmountInTheEnd;
}
else
{
oSelect.options.length = 0; for (var i=0; i<givenCtrl.selectListBackup.options.length; i++)
{
oSelect.options[oSelect.options.length] = new Option(givenCtrl.selectListBackup.options(i).innerText,i);
}
}
}RebuildCheckBoxControlor("chkExpensive","oCar",2);
RebuildCheckBoxControlor("chkNoMeat","oFood",3);
RebuildCheckBoxControlor("chkSeason","oText",4);//-->
</script>
</body>
</html>