DeDe-Ajax-js Application

Introduction: This is a detailed page for DeDe-Ajax-js applications. It introduces PHP, related knowledge, skills, experience, and some PHP source code.

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<! --
// XMLHTTP and xmldom objects
VaR dedexhttp = NULL;
VaR dedexdom = NULL;
VaR dedecontainer = NULL;
VaR dedeshowerror = false;
VaR dedeshowwait = false;
VaR deerrcon = "";
VaR dedeerrdisplay = "failed to download data ";
VaR dedewaitdisplay = "downloading data ...";

// Obtain the element of the specified ID

Function $ de (ID ){
Return document. getelementbyid (ID );
}

// Gcontainer is the container that saves the downloaded content.
// Whether mshowerror prompts an error message
// Dedeshowwait indicates whether to wait for the message.
// What string is returned by the merrcon server is considered as an error
// Information displayed when an error occurs in merrdisplay
// Message displayed when mwaitdisplay is waiting
// Call deajax by default ('divid', false, false ,'','','')

Function dedeajax (gcontainer, mshowerror, mshowwait, merrcon, merrdisplay, mwaitdisplay)
{
Dedecontainer = gcontainer;
Dedeshowerror = mshowerror;
Dedeshowwait = mshowwait;
If (merrcon! = "") Dedeerrcon = merrcon;
If (merrdisplay! = "") Dedeerrdisplay = merrdisplay;
If (merrdisplay = "X") dedeerrdisplay = "";
If (mwaitdisplay! = "") Dedewaitdisplay = mwaitdisplay;

// Key-value pairs for sending data via post or get
This. Keys = array ();
This. Values = array ();
This. keycount =-1;
This. sendlang = 'gb2312 ';

// Request Header type
This. Rtype = 'text ';

// Initialize XMLHTTP
// IE6 and ie5
If (window. activexobject ){
Try {dedexhttp = new activexobject ("msxml2.xmlhttp");} catch (e ){}
If (dedexhttp = NULL) Try {dedexhttp = new activexobject ("Microsoft. XMLHTTP");} catch (e ){}
}
Else {
Dedexhttp = new XMLHttpRequest ();
}

// Add a post or get key-Value Pair
This. addkeyn = function (skey, svalue ){
If (this. sendlang = 'utf-8') This. addkeyutf8 (skey, svalue );
Else this. addkey (skey, svalue );
};

This. addkey = function (skey, svalue ){
This. keycount ++;
This. Keys [This. keycount] = skey;
Svalue = svalue + '';
If (svalue! = '') Svalue = svalue. Replace (/\ +/g, '$ # $ ');
This. Values [This. keycount] = escape (svalue );
};

// Add a post or get key-Value Pair
This. addkeyutf8 = function (skey, svalue ){
This. keycount ++;
This. Keys [This. keycount] = skey;
Svalue = svalue + '';
If (svalue! = '') Svalue = svalue. Replace (/\ +/g, '$ # $ ');
This. Values [This. keycount] = encodeuri (svalue );
};

// Add an HTTP request header key-Value Pair
This. addhead = function (skey, svalue ){
This. rkeycount ++;
This. rkeys [This. rkeycount] = skey;
This. rvalues [This. rkeycount] = svalue;
};

// Clear the hash table parameters of the current object
This. clearset = function (){
This. keycount =-1;
This. Keys = array ();
This. Values = array ();
This. rkeycount =-1;
This. rkeys = array ();
This. rvalues = array ();
};

Dedexhttp. onreadystatechange = function (){
// This event will be executed in IE6 regardless of blocking or asynchronous mode.
If (dedexhttp. readystate = 4 ){
If (dedexhttp. Status = 200)
{
If (dedexhttp. responsetext! = Dedeerrcon ){
Dedecontainer. innerhtml = dedexhttp. responsetext;
}
Else {
If (dedeshowerror) dedecontainer. innerhtml = dedeerrdisplay;
}
Dedexhttp = NULL;
}
Else {If (dedeshowerror) dedecontainer. innerhtml = dedeerrdisplay ;}
}
Else {If (dedeshowwait) dedecontainer. innerhtml = dedewaitdisplay ;}
};

// Check the status of the blocking mode
This. barragestat = function (){
If (dedexhttp = NULL) return;
If (typeof (dedexhttp. Status )! = Undefined & amp; dedexhttp. Status = 200)
{
If (dedexhttp. responsetext! = Dedeerrcon ){
Dedecontainer. innerhtml = dedexhttp. responsetext;
}
Else {
If (dedeshowerror) dedecontainer. innerhtml = dedeerrdisplay;
}
}
};

// Send the HTTP Request Header
This. sendhead = function ()
{
// Send the User-Defined Request Header
If (this. rkeycount! =-1)
{
For (VAR I = 0; I <= This. rkeycount; I ++)
{
Dedexhttp. setRequestHeader (this. rkeys [I], this. rvalues [I]);
}
}
If (this. Rtype = 'binary '){
Dedexhttp. setRequestHeader ("Content-Type", "multipart/form-Data ");
} Else {
Dedexhttp. setRequestHeader ("Content-Type", "application/X-WWW-form-urlencoded ");
}
};

// Send data in post Mode
This. sendpost = function (purl ){
VaR pdata = "";
VaR I = 0;
This. State = 0;
Dedexhttp. Open ("Post", purl, true );
This. sendhead ();
// Post Data
If (this. keycount! =-1)
{
For (; I <= This. keycount; I ++)
{
If (pdata = "") pdata = This. Keys [I] + '=' + this. Values [I];
Else pdata + = "&" + this. Keys [I] + '=' + this. Values [I];
}
}
Dedexhttp. Send (pdata );
};

// Send data in get Mode
This. sendget = function (purl ){
VaR gkey = "";
VaR I = 0;
This. State = 0;
// Get Parameters
If (this. keycount! =-1)
{
For (; I <= This. keycount; I ++)
{
If (gkey = "") gkey = This. Keys [I] + '=' + this. Values [I];
Else gkey + = "&" + this. Keys [I] + '=' + this. Values [I];
}
If (Purl. indexof ('? ') =-1) purl = purl + '? '+ Gkey;
Else purl = purl + '&' + gkey;
}
Dedexhttp. Open ("get", purl, true );
This. sendhead ();
Dedexhttp. Send (null );
};

// use get to send data. Blocking Mode
This. sendget2 = function (purl) {
var gkey = "";
var I = 0;
This. state = 0;
// get parameter
If (this. keycount! =-1)
{< br> for (; I <= This. keycount; I ++)
{< br> If (gkey = "") gkey = This. keys [I] + '=' + this. values [I];
else gkey + = "&" + this. keys [I] + '=' + this. values [I];
}< br> If (Purl. indexof ('? ') =-1) purl = purl + '? '+ Gkey;
else purl = purl +' & '+ gkey;
}< br> dedexhttp. open ("get", purl, false);
This. sendhead ();
dedexhttp. send (null);
// Firefox directly checks the xhttp status
This. barragestat ();
};

// Send data in post Mode
This. sendpost2 = function (purl ){
VaR pdata = "";
VaR I = 0;
This. State = 0;
Dedexhttp. Open ("Post", purl, false );
This. sendhead ();
// Post Data
If (this. keycount! =-1)
{
For (; I <= This. keycount; I ++)
{
If (pdata = "") pdata = This. Keys [I] + '=' + this. Values [I];
Else pdata + = "&" + this. Keys [I] + '=' + this. Values [I];
}
}
Dedexhttp. Send (pdata );
// Directly checks the xhttp status in Firefox
This. barragestat ();
};

} // End class dedeajax

// Initialize xmldom
Function initxdom (){
If (dedexdom! = NULL) return;
VaR OBJ = NULL;
// Gecko, Mozilla, and Firefox
If (typeof (domparser )! = "Undefined "){
VaR parser = new domparser ();
OBJ = parser. parsefromstring (xmltext, "text/XML ");
}
// IE
Else {
Try {OBJ = new activexobject ("msxml2.domdocument");} catch (e ){}
If (OBJ = NULL) Try {OBJ = new activexobject ("Microsoft. xmldom");} catch (e ){}
}
Dedexdom = OBJ;
};

// Read and write cookie Functions
Function getcookie (c_name)
{
If (document. Cookie. length> 0)
{
C_start = Document. Cookie. indexof (c_name + "= ")
If (c_start! =-1)
{
C_start = c_start + c_name.length + 1;
C_end = Document. Cookie. indexof (";", c_start );
If (c_end =-1)
{
C_end = Document. Cookie. length;
}
Return Unescape (document. Cookie. substring (c_start, c_end ));
}
}
Return null
}

Function setcookie (c_name, value, expiredays)
{
VaR exdate = new date ();
Exdate. setdate (exdate. getdate () + expiredays );
Document. Cookie = c_name + "=" + escape (value) + (expiredays = NULL )? "": "; Expires =" + exdate. togmtstring (); // make the set effective time correct. Add togmtstring ()
}

// Ajax call
Function Ajax (ID, URL)
{
VaR taget_obj = Document. getelementbyid (ID );
Myajax = new dedeajax (taget_obj, false, false ,'','','');
Myajax. sendget2 (URL );
Dedexhttp = NULL;
}

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<Div id = "ajax1"> <a href = "javascript: Ajax ('ajax1', 'xx. php')"> Ajax test </a> </div>

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