js获取Listbox选择的值

将Listbox的 SelectionMode="Multiple"，设置为多选时，用JS获取多选的值。

<script type="text/javascript">function GetValue() {var strlist = document.getElementById("ListBox1");//获取Listboxvar 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);}else {alert("No Item in Listbox");}}</script>