js 操作Listbox js 获取Listbox选择的值的代码

<script type="text/javascript">

function GetValue() {

var strlist = document.getElementById("ListBox1");//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);

}

else {

alert("No Item in Listbox");

}

}

</script>

js 操作Listbox

function SelectAll()

{

var lst1=window.document.getElementById("SourceListBox");

var length = lst1.options.length;

for(var i=0;i {

var v = lst1.options[i].value;

var t = lst1.options[i].text;

var lst2=window.document.getElementById("DestinationListBox");

lst2.options[i] = new Option(t,v,true,true);

}

}

function DelAll()

{

var lst2=window.document.getElementById("DestinationListBox");

var length = lst2.options.length;

for(var i=length;i>0;i--)

{

lst2.options[i-1].parentNode.removeChild(lst2.options[i-1]);

}

}

function SelectOne()

{

var lst1=window.document.getElementById("SourceListBox");

var lstindex=lst1.selectedIndex;

if(lstindex<0)

return;

var v = lst1.options[lstindex].value;

var t = lst1.options[lstindex].text;

var lst2=window.document.getElementById("DestinationListBox");

lst2.options[lst2.options.length] = new Option(t,v,true,true);

}

function DelOne()

{

var lst2=window.document.getElementById("DestinationListBox");

var lstindex=lst2.selectedIndex;

if(lstindex>=0)

{

var v = lst2.options[lstindex].value+";";

lst2.options[lstindex].parentNode.removeChild(lst2.options[lstindex]);

}

}