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comparison themes/blog.mail-scanning.com/ajax.js @ 269:53c79b52862a

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author Steve Kemp <steve@steve.org.uk>
date Mon, 04 Aug 2008 20:04:15 +0100
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268:dbee53530497 269:53c79b52862a
1 // -*-mode: C++; style: K&R; c-basic-offset: 4 ; -*- */
2 //
3 // Simple collection of Javascript for Ajax form submission.
4 //
5
6
7
8
9 //
10 // Get an XMLHTTPRequest object.
11 //
12 function getXMLHTTPRequest()
13 {
14 req = false;
15 if(window.XMLHttpRequest)
16 {
17 try
18 {
19 req = new XMLHttpRequest();
20 }
21 catch(e)
22 {
23 req = false;
24 }
25 }
26 else if(window.ActiveXObject)
27 {
28 try
29 {
30 req = new ActiveXObject("Msxml2.XMLHTTP");
31 }
32 catch(e)
33 {
34 try
35 {
36 req = new ActiveXObject("Microsoft.XMLHTTP");
37 }
38 catch(e)
39 {
40 req = false;
41 }
42 }
43 }
44
45 return( req );
46 }
47
48
49 //
50 // Submit the comment.
51 //
52 function submitComment()
53 {
54 showProgress();
55
56 var xhr = getXMLHTTPRequest();
57 if(! xhr )
58 {
59 hideProgress();
60 return;
61 }
62
63 xhr.onreadystatechange = function()
64 {
65 if(xhr.readyState == 4)
66 {
67 if(xhr.status == 200)
68 {
69 var o = document.getElementById( "output" );
70 o.innerHTML = xhr.responseText;
71 }
72 else
73 {
74 var o = document.getElementById( "output" );
75 o.innerHTML = "Failed HTTP code " + xhr.status + " " + xhr.responseText;
76 }
77
78 hideProgress();
79 }
80 };
81
82 data = 'ajax=1';
83 data = data + '&id=' + escape(document.forms[0].id.value );
84 data = data + '&captcha=' + escape( document.forms[0].captcha.value );
85 data = data + '&id=' + escape(document.forms[0].id.value );
86 data = data + '&captcha=' + escape( document.forms[0].captcha.value );
87 data = data + '&name=' + escape( document.forms[0].name.value );
88 data = data + '&mail=' + escape( document.forms[0].mail.value );
89 data = data + '&body=' + escape( document.forms[0].body.value );
90
91 //
92 // Make the request
93 //
94 xhr.open("POST", "/cgi-bin/comments.cgi", true);
95 xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
96 xhr.send(data);
97 }
98
99
100 //
101 // Show our progress marker.
102 //
103 function showProgress()
104 {
105 var i = document.getElementById( "progress" );
106 if ( i )
107 {
108 i.style.display = 'block';
109 }
110 }
111
112 //
113 // Hide our progress marker.
114 //
115 function hideProgress()
116 {
117 var i = document.getElementById( "progress" );
118 if ( i )
119 {
120 i.style.display = 'none';
121 }
122 }