Compare to .Net, in PHP you may declare your javascript code at header page and then used it while you display your page.
Here is how to write a simple Javascript in .Net.
In this sample (in VB.Net), you will create a page with a button inside it. When you press this button it will display a confirmation text
Now, create a new page, for this example, i just create Default.aspx
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
<asp:Button ID="Button1" runat="server" Text="Show Confirmation" />
</form>
</body>
</html>
Next in Default.vb.aspx
Imports System.Web.UI.ClientScriptManager
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim scriptText As String
scriptText = "return confirm('Do you want to submit the page?')"
ClientScript.RegisterOnSubmitStatement(Me.GetType(), "ConfirmSubmit", scriptText)
End Sub
End Class
Please concentrate on "ClientScript", here we register the script on submit event. On the next sample, i will show you how to register a block of javascript codes and we can used it later on :)
