Add selected item from dropdownlist to listbox using javascript

This sample code snippet shows how to add selected item of dropdownlist into listbox using javascript.

On Default.aspx Page

< script language="javascript" type="text/javascript">
function itemsadd()
{
var myForm = document.Form1;
//Form Namevar mylist = myForm.listbox1;
// Listbox Name var myOpt;
myOpt = document.createElement("Option");
if(document.getElementById("ddl1").selectedIndex > 0)
{
myOpt.text = document.getElementById("ddl1").value;
//text of dropdownlistmyOpt.value = document.getElementById("ddl1").selectedIndex;
//index value of dropdownlistmylist.add(myOption);
add item of dropdown list into listbox
}
</script>

On Default.aspx.cs Page:

page_load()
{
ddl1.attributes.add("OnChange","itemsadd");
}

Thanks and Regards
Varun Bansal
Assitant Programmer
NIC, Jaipur