Listbox 多选、单选、以及移除操作
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title></title>
</head>
<body>
<script language="JavaScript" type="text/javascript">
<!--
function addIt(){
var input = document.getElementById("input");
var output = document.getElementById("output");
for(i = 0; i < input.length; i ++ ) {
if(input[i].selected == true) {
if( output.length == 0){
var option = new Option();
option.text = input[i].innerText;
option.value = input[i].value;
output.add(option);
}
var isExist = false;
for(j = 0; j < output.length; j ++ ){
if (output[j].text == input[i].innerText){
isExist = true;
break;
}
}
if (isExist == false){
var option = new Option();
option.text = input[i].innerText;
option.value = input[i].value;
output.add(option);
}
}
}
}
function deleteIt(){
var output = document.getElementById("output");
for(i = 0; i<output.length; i++){
if (output[i].selected == true){
output.options.removeChild(output[i--]);
}
}
}
//取值
function GetValue() {
var strlist = document.getElementById("output"); //获取Listbox
var str = "";
//遍历Listbox，取得选中项的值
if (strlist.options.length > 0) {
for (var i = 0; i < strlist.options.length; i++) {
// if (strlist.options[i].selected == true) {
var j = strlist.options[i].value;
str += j + ","; //把Value值串起来
// }
}
var strValue = str.replace(/,$/, ""); //去掉最后一个逗号
//alert(strValue);
var hid = document.getElementById("hidAPPID");
hid.value = strValue;
alert(hid.value);
}
else {
alert("No Item in Listbox");
}
}
// -->
</script>
<table width="80%" border="0" align="center" style="margin-top:20px;">
<tr>
<td align="right">
<select name="input" size="10" multiple="multiple" id="input" style="width:200px; font-size:16px">
<option>美元/英镑</option>
<option>美元/港币</option>
<option>美元/新加坡元</option>
<option>美元/日元</option>
<option>美元/加拿大元</option>
<option>美元/欧元</option>
</select>
</td>
<td align="center">
<p>
<input type="button" name="Submit" value="增 加" onclick="addIt()"/>
</p>
<p>
<input type="button" name="Submit2" value="删 除" onclick="deleteIt()"/>
</p>
</td>
<td>
<select name="output" size="10" multiple="multiple" id="output" style="width:200px; font-size:16px">
</select>
</td>
</tr>
</table>
</body>
</html>
学习自CSDN
