JavaScript Split

We are already use split function in c# server side code, In below code is Split function in client side code.ASPX Page 

Aspx page

<asp:Text Box runat="server" ID="text1"></asp:Text Box>

<asp:Text Box runat="server" ID="text2"></asp:Text Box>

<asp:Button ID="btn" runat="server" text="reverse" onClientClick="reverse(this)"></asp:Button>

Script
 

function reverse(evt1) {

var txt = document.getelementById("text1").value;

var n = text.split(" ");

document.getElementById("text2").value = n[1] + " " + n[0];

}