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左边select内容选择到右边select内容里面的js实现方法(可以多选和全选)

2009-02-06 17:19 881 查看
<html>
<head></head>
<BODY>
<mce:script language="JavaScript"><!--
function copyToList(from,to) //from表示:包含可选择项目的select对象名字 to表示:列出可选择项目的select对象名字
//你可以根据你的具体情况修改
{
fromList = eval('document.forms[0].' + from);
toList = eval('document.forms[0].' + to);
if (toList.options.length > 0 && toList.options[0].value == 'temp')
{
toList.options.length = 0;
}
var sel = false;
for (i=0;i<fromList.options.length;i++)
{
var current = fromList.options[i];
if (current.selected)
{
sel = true;
if (current.value == 'temp')
{
alert ('你不能选择这个项目!');
return;
}
txt = current.text;
val = current.value;
toList.options[toList.length] = new Option(txt,val);
fromList.options[i] = null;
i--;
}
}
}
function allSelect() //这是当用户按下提交按钮时,对列出选择的select对象执行全选工作,让递交至的后台程序能取得相关数据
{
List = document.forms[0].chosen;
if (List.length && List.options[0].value == 'temp') return;
for (i=0;i<List.length;i++)
{
List.options[i].selected = true;
}
}
function copyAll(from,to){
var fromList = eval('document.forms[0].' + from);
var toList = eval('document.forms[0].' + to);
if (toList.options.length > 0 && toList.options[0].value == 'temp')
{
toList.options.length = 0;
}
for (i=0;i<fromList.options.length;i++)
{
var current = fromList.options[i];
toList.options[toList.length] = new Option(current.text,current.value);
fromList.options[i] = null;
i--;
}
}
// --></mce:script>
<table border="0"> <form onSubmit="allSelect()">
<tr>
<td>
<select name="possible" size="4"
MULTIPLE width=200 style="width: 200px">
<option value="1">中国广州
<option value="2">中国上海
<option value="3">中国北京
<option value="4">中国武汉

</select>
</td>
<td><a href="javascript:copyToList('possible','chosen')" mce_href="javascript:copyToList('possible','chosen')">添加至右方--></a><br>
<br>
<a href="javascript:copyAll('possible','chosen')" mce_href="javascript:copyAll('possible','chosen')">添加All至右方--></a>
<br><br>
</a><a href="javascript:copyToList('chosen','possible')" mce_href="javascript:copyToList('chosen','possible')"><--添加至左方
</a><br><br>                   </a><a href="javascript:copyAll('chosen','possible')" mce_href="javascript:copyAll('chosen','possible')"><--添加All至
左方</a>
<br></td>
<td>
<select name="chosen" size="4"
MULTIPLE width=200 style="width: 200px;">
<option value="temp">从左边选择你的地区
</select>
</td>
</tr> </form>
</table>
</BODY>
</html>
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