Subversion Repositories bacoAlunos

Rev

Rev 48 | Rev 92 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
53 jmachado 1 
/**
2 
*
3 
* AJAX Functions
4 
*
5 
* This code is protected under GNU LGPL License
6 
*
7 
* @author Jorge Machado
8 
* @date April 2008
9 
**/
1 fvelez 10 
 
53 jmachado 11 
/**
12 
 * Starts XMLHTTP Ajax request
13 
 *
14 
 * @author Jorge Machado
15 
 * @date April 2008
16 
 *
17 
 * params:
18 
 * @params HTTP GET Parameters for query string
19 
 * @xmlHttpRequest request
20 
 * @id target element
21 
 * @stateChanged target function
22 
 * @innerPhrase to put while waiting for response
23 
 * @navjsp requested jsp
24 
 */
25 
function startRequest(xmlHttpRequest,params,id,stateChanged,innerPhrase,navjsp)
26 
{
27 
    if(innerPhrase != '')
28 
        getObjectById(id).innerHTML = innerPhrase;
29 
    if (xmlHttpRequest==null)
30 
    {
31 
        alert ("Browser does not support HTTP Request");
32 
        return;
33 
    }
34 
    var url= navjsp;
35 
    if(params != null && params.length > 0)
36 
    {
37 
        url=url+"?"+ params;
38 
        url=url+"&sid="+Math.random();
39 
    }
40 
    else
41 
    {
42 
        url=url+"?sid="+Math.random();
43 
    }
44 
    xmlHttpRequest.onreadystatechange=stateChanged;
45 
    xmlHttpRequest.open("GET",url,true);
46 
    xmlHttpRequest.send(null);
47 
}
1 fvelez 48 
 
53 jmachado 49 
/**
50 
 * Return an HTML element given ID
51 
 *
52 
 * @author Jorge Machado
53 
 * @date April 2008
54 
 *
55 
 * params:
56 
 * @objectId required object
57 
 */
58 
function getObjectById(objectId)
59 
{
60 
    // cross-browser function to get an object's style object given its id
61 
    try
62 
    {
63 
        if(document.getElementById && document.getElementById(objectId))
1 fvelez 64 
        {
65 
            // W3C DOM
53 jmachado 66 
            return document.getElementById(objectId);
67 
        }
68 
        else if (document.all(objectId))
69 
        {
1 fvelez 70 
            // MSIE 4 DOM
53 jmachado 71 
            return document.all(objectId);
72 
        }
73 
        else if (document.layers && document.layers[objectId])
74 
        {
1 fvelez 75 
            // NN 4 DOM.. note: this won't find nested layers
53 jmachado 76 
            return document.layers[objectId];
1 fvelez 77 
        }
53 jmachado 78 
        else
1 fvelez 79 
        {
80 
            return false;
81 
        }
53 jmachado 82 
    }
83 
    catch(e)
84 
    {
85 
        return false;
86 
    }
1 fvelez 87 
}
88 
 
89 
/**
53 jmachado 90 
 * Creates a new XmlHttpObject
91 
 * @author Jorge Machado
92 
 * @date April 2008
1 fvelez 93 
 *
53 jmachado 94 
 * params:
95 
 * @handler target xmlHttpObject function
1 fvelez 96 
 */
53 jmachado 97 
function GetXmlHttpObject(handler)
1 fvelez 98 
{
53 jmachado 99 
    var objXmlHttp = null;
100 
    if (navigator.userAgent.indexOf("Opera")>=0)
101 
    {
102 
        alert("This example doesn't work in Opera") ;
103 
        return objXmlHttp;
104 
    }
105 
    if (navigator.userAgent.indexOf("MSIE")>=0)
106 
    {
107 
        var strName="Msxml2.XMLHTTP";
108 
        if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
1 fvelez 109 
        {
53 jmachado 110 
            strName="Microsoft.XMLHTTP";
1 fvelez 111 
        }
53 jmachado 112 
        try
113 
        {
114 
            objXmlHttp=new ActiveXObject(strName);
115 
            objXmlHttp.onreadystatechange=handler ;
116 
            return objXmlHttp;
117 
        }
118 
        catch(e)
119 
        {
120 
            alert("Error. Scripting for ActiveX might be disabled") ;
121 
            return objXmlHttp;
122 
        }
123 
    }
124 
    if (navigator.userAgent.indexOf("Mozilla")>=0)
125 
    {
126 
        objXmlHttp=new XMLHttpRequest();
127 
        objXmlHttp.onload=handler;
128 
        objXmlHttp.onerror=handler;
129 
        return objXmlHttp;
130 
    }
1 fvelez 131 
}
132 
 
53 jmachado 133 
/***************************************************
134 
 TopFlashNews
135 
***************************************************/
136 
var xmlHttpTopFlashNews;
137 
var getFlashNewsTimeout;
138 
var getFlashNewsJsp;
1 fvelez 139 
 
53 jmachado 140 
function getFlashNews(jsp,timeout)
48 fvelez 141 
{
53 jmachado 142 
    getFlashNewsJsp = jsp;
143 
    getFlashNewsTimeout = timeout;
144 
    getFlashNewsTimeoutCall();
48 fvelez 145 
}
53 jmachado 146 
function getFlashNewsTimeoutCall()
48 fvelez 147 
{
53 jmachado 148 
    xmlHttpTopFlashNews=GetXmlHttpObject(stateChangedGetFlashNews);
149 
    startRequest(xmlHttpTopFlashNews,"","flashTopNews",stateChangedGetFlashNews,"",getFlashNewsJsp)
48 fvelez 150 
}
151 
function stateChangedGetFlashNews()
152 
{
53 jmachado 153 
    if (xmlHttpTopFlashNews.readyState==4 || xmlHttpTopFlashNews.readyState=="complete")
154 
    {
155 
        getObjectById("flashTopNews").innerHTML=xmlHttpTopFlashNews.responseText;
156 
        setTimeout(getFlashNewsTimeoutCall,getFlashNewsTimeout);
157 
    }
48 fvelez 158 
}
1 fvelez 159 
 
160 
 
161 
 
162 
 
163 
 
164 
 
165 
 
166 
 
167 
 
168 
 
169 
 
170 
 
48 fvelez 171 
 
172 
 
173 
 
174