Embedding Code in HTML

Code can be included in HTML file. This code gets executed by the server and the result placed in its place before the page is sent to browser.

Microsoft's Active Server Pages is an example.The language looks like:

Sub Page_Load(sender as Object, e as EventArgs)
  If Not Page.IsPostBack Then
    ' Default BG color to white to match the way it
    ' looks when the page first loads.
    back_red.Value = "FF"
    back_green.Value = "FF"
    back_blue.Value = "FF"
  End If
End Sub

JavaServer Pages does the same but uses Java. PHP also does the same but uses a C-like language.