Building a Web Site with Ajax: Visual QuickProject Guide

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Larry Ullman

"Building a Web Site with Ajax: Visual QuickProject Guide"

4 Save the fi le (it will continue to use the name add_employee.html).
??¦
Add an Employee

??¦
??¦

Use this form to add an employee (all fields are
required):

form???>
??¦
62 adding records via Ajax
apply the Ajax layer
1 The fi rst line tells the Web browser to run the init() function after
loading the entire page. The init() function sets up all the Ajax activity.
2 The function calls the getXMLHttpRequestObject()
function
to get a valid, browser-specifi c
object. This function is defi ned in
ajax.js, which will have already
been included by the HTML page.
3 The function then checks to
see if the ajax variable has a valid
value. With supported browsers,
ajax will be an XMLHttpRequest
object. With nonsupported browsers,
ajax will have a value of
false, and this conditional will
be false.

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Larry Ullman

"Building a Web Site with Ajax: Visual QuickProject Guide"