Introduction to the examples of common functions in AJAX
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Create XMLHTTP objects to distinguish IE,Mozilla browsers
The code is as follows:
Function getRequest () {
Http_request = false
If (window.XMLHttpRequest) {
/ / for browsers such as Mozilla, Netscape, Safari, create a XMLHttpRequest
Http_request = new XMLHttpRequest ()
If (http_request.overrideMimeType) {
/ / if the header of the server response is not text/xml, you can call other methods to modify the header
Http_request.overrideMimeType ('text/xml')
}
} else if (window.ActiveXObject) {
/ / for Internet Explorer browsers, create a XMLHttpRequest
Try {
Http_request = new ActiveXObject ("Msxml2.XMLHTTP")
} catch (e) {
Try {
Http_request = new ActiveXObject ("Microsoft.XMLHTTP")
} catch (e) {}
}
}
Return http_request
}
/ / obtain the responseText of Url
The code is as follows:
Function getResponseText (url)
{
Http_request=getRequest ()
Http_request.open ('GET', url, false)
Http_request.send (null)
If (http_request.readyState = = 4)
{
/ / receive a complete server response
If (http_request.status = = 200) {
/ / the value OK of the HTTP server response
Requestdoc = http_request.responseText
/ / write the string returned by the server to the area of the page where ID is message
}
Else {
Requestdoc = http_request.status
}
}
Return requestdoc
}
/ / obtain the responseXML of Url
The code is as follows:
Function getResponseText (url)
{
Http_request=getRequest ()
Http_request.open ('GET', url, false)
Http_request.send (null)
If (http_request.readyState = = 4)
{
/ / receive a complete server response
If (http_request.status = = 200) {
/ / the value OK of the HTTP server response
Requestdoc = http_request.responseXML
/ / write the string returned by the server to the area of the page where ID is message
}
Else {
Requestdoc = http_request.status
}
}
Return requestdoc
}
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