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Ajax in javascript contains four parts.
first part makes xml object.
.open(type,url,true or false)
- type denotes method either post or get.
- url denotes file path.
.onreadystatechange
what to do on ajax completion.
- readyState denotes status of ajax request {4 denotes ajax is successfully completed} .
0 The request is not initialized
1 The request has been set up
2 The request has been sent
3 The request is in process
4 The request is complete
send() method sends the request off to the server
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<script type="text/javascript">
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var http_request;
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function ajax(url) {
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if (window.XMLHttpRequest) { // Mozilla, Safari, IE7…
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http_request = new XMLHttpRequest();
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} else if (window.ActiveXObject) { // IE6 and older
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http_request = new ActiveXObject("Microsoft.XMLHTTP");
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}
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http_request.open("POST", url , true);
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http_request.onreadystatechange = alertContents;
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http_request.send(null);
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}
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function alertContents() {
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if (http_request.readyState == 4) {
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alert(http_request.responseText);
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}
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}
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</script>
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<a href="javascript:ajax(’test.xml’)" id="mybutton" name="mybutton">ajax</a>
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