请教：如何用程序把下拉框“拉下来”？先谢谢了。

zhqi 2003-02-25 05:34:07

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emu_ston 2003-02-28

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呵呵，我的也可以随时调用的啊

qiudehuo 2003-02-27

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<html>

<head>
<meta name="GENERATOR" content="Microsoft FrontPage 5.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>新建网页 1</title>
</head>
<script>
function downlist(thelist)
{
var listHtml = thelist.outerHTML;
listHtml ="<select size='4' multiple id='downlist' name='downlist' onchange='changeValue(this)'></select>"
var tmpList = document.createElement(listHtml);
tmpList.style.position= "absolute";
tmpList.style.pixelLeft = getLeftPostion(thelist);
tmpList.style.pixelTop = getTopPostion(thelist)+20;
document.form1.appendChild(tmpList);
for(i=0;i<thelist.length;i++){
var oOption = document.createElement('OPTION');
oOption.text = thelist.options[i].text;
oOption.value =thelist.options[i].value;
tmpList.options.add(oOption);
}

}
function changeValue(the)
{
document.form1.D1.options[the.selectedIndex].selected=true;
document.form1.removeChild(window.document.getElementById("downlist"));
}
function getLeftPostion( theObj )
{
var pos = 0;
while ( theObj != null )
{
pos += theObj.offsetLeft;
theObj = theObj.offsetParent;
}
return pos;
}
function getTopPostion( theObj )
{
var pos = 0;
while ( theObj != null )
{
pos += theObj.offsetTop;
theObj = theObj.offsetParent;
}
return pos;
}
</script>
<body>

<form name="form1" method="POST" action="--WEBBOT-SELF--">
<select size="1" name="D1">
<option>黄花菜1</option>
<option>黄花菜2</option>
<option>黄花菜3</option>
<option>黄花菜4</option>

</select><br>
<input type="button" value="按钮" name="B1" onclick="downlist(document.form1.D1)"><input type="reset" value="重置" name="B2"></p>
</form>

</body>

</html>

walkingpoison 2003-02-27

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如果你浏览器安全级别允许的话，可以用下面的代码

<select id=s1>
<option >1</option>
<option >2</option>
<option >3</option>
<option >4</option>
<option >5</option>
<option >6</option>
</select>
<input type=button id=b1 value=go onclick="aa()">
<script>
function aa(){
var f=new ActiveXObject("WScript.SHELL");
s1.focus();
f.SendKeys("%{DOWN}");
}
</script>

walkingpoison 2003-02-27