<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title>JavaScript强化训练－－下拉列表的操作01</title>
<script language="JavaScript" type="text/javascript">
//移动下拉框被选中选项
//fromSelId :源下拉框id
//toSelId :目标下拉框id
function moveOption(fromSelId,toSelId){
var fromSel = document.getElementById(fromSelId);
var toSel = document.getElementById(toSelId);
if(fromSel==null||toSel==null){
return false;
}
for(var i = 0;i < fromSel.options.length;i++){
var _option = fromSel.options[i];
//是否选中
if(_option.selected){
//往目标下拉框加添加选项
toSel.appendChild(_option);
i--;
}
}
}
</script>
</head>
<body bgcolor="abcdef">
<form id='demoFrm' name="demoFrm" method="post" action="" >
<table border="1" align="center" width="300">
<tr>
<td colspan="3" align="center">下拉列表操作的演示</td>
</tr>
<tr>
<td align="center" width="100">
<select multiple="multiple" size="10" id="leftSel">
<option value="1">第一个理拉框的值1</option>
<option value="2">第一个理拉框的值2</option>
<option value="3">第一个理拉框的值3</option>
<option value="4">第一个理拉框的值4</option>
</select>
</td>
<td align="center" width="100">
<input type="button" id="moveTwo" value="-->>" onclick="moveOption('leftSel','rightSel');">
<br>
<input type="button" id="moveOne" value="<<--" onclick="moveOption('rightSel','leftSel');">
</td>
<td align="center" width="100">
<select multiple="multiple" size="10" id="rightSel">
<option value="1">第二个理拉框的值1</option>
<option value="2">第二个理拉框的值2</option>
<option value="3">第二个理拉框的值3</option>
<option value="4">第二个理拉框的值4</option>
</select>
</td>
</tr>
</table>
</form>
<div id="showContent" style="font-size:30px;">
</div>
</body>
</html>