JS Operation ListBox

Js

Select a person or department or other, often use 2 ListBox, the following JS code, hoping to give everyone and their own convenience

function SelectAll ()
{
var Lst1=window.document.getelementbyid ("Sourcelistbox");
var length = Lst1.options.length;
for (Var i=0;i<length;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]);
}

}