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Making a simple XMLHTTP Request


Code



function makeRequest(url) {
        var http_request = false;
        url = url +  "?txt1=" + document.getElementById('first_no').value + '&' + "txt2=" + document.getElementById('second_no').value;
       
     if (window.XMLHttpRequest) { // Mozilla, Safari, ...
            http_request = new XMLHttpRequest();
            if (http_request.overrideMimeType) {
                http_request.overrideMimeType('text/xml');
                // See note below about this line
            }
        } else if (window.ActiveXObject) { // IE
            try {
                http_request = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    http_request = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }

        if (!http_request) {
            alert('Giving up :( Cannot create an XMLHTTP instance');
            return false;
        }
        http_request.onreadystatechange = function() { alertContents(http_request); };
        http_request.open('GET', url, true );
       
        http_request.send(null);

    }

    function alertContents(http_request) {

        if (http_request.readyState == 4) {
            if (http_request.status == 200) {

              document.getElementById('spid').innerHTML = http_request.responseText ;

            } else {
                alert('There was a problem with the request.');

            }
        }

    }


 

 

 
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