how to pass four values or four arguments from four dropdown to ajax?











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I am trying to pass 4 arguments from a drop-down to Ajax but i get the following error:




Uncaught TypeError: Cannot set property 'innerHTML' of null at
XMLHttpRequest.xmlhttp.onreadystatechange




function showreports() {

    var str = document.getElementById("p").value;

    var str1 = document.getElementById("t").value;

    var str2 = document.getElementById("sem").value;

    var str3 = document.getElementById("ses").value;





    if (str == 0) {

        document.getElementById("txtHint").innerHTML = "";

        return;

    } else {

        var xmlhttp = new XMLHttpRequest();

        xmlhttp.onreadystatechange = function () {

            if (this.readyState == 4 && this.status == 200) {

                document.getElementById("txtHint").innerHTML = this.responseText;

            }

        };

        xmlhttp.open("GET", "get_reports.php?p=" + str, true);

        xmlhttp.send();

    }

}





javascript ajax







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  • 1




    Where is your html? Seems you haven't defined txtHint
    – B001ᛦ
    Nov 8 at 9:57

















up vote
0
down vote

favorite












I am trying to pass 4 arguments from a drop-down to Ajax but i get the following error:




Uncaught TypeError: Cannot set property 'innerHTML' of null at
XMLHttpRequest.xmlhttp.onreadystatechange




function showreports() {

    var str = document.getElementById("p").value;

    var str1 = document.getElementById("t").value;

    var str2 = document.getElementById("sem").value;

    var str3 = document.getElementById("ses").value;





    if (str == 0) {

        document.getElementById("txtHint").innerHTML = "";

        return;

    } else {

        var xmlhttp = new XMLHttpRequest();

        xmlhttp.onreadystatechange = function () {

            if (this.readyState == 4 && this.status == 200) {

                document.getElementById("txtHint").innerHTML = this.responseText;

            }

        };

        xmlhttp.open("GET", "get_reports.php?p=" + str, true);

        xmlhttp.send();

    }

}





javascript ajax







share|improve this question









New contributor




Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
















  • 1




    Where is your html? Seems you haven't defined txtHint
    – B001ᛦ
    Nov 8 at 9:57















up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am trying to pass 4 arguments from a drop-down to Ajax but i get the following error:




Uncaught TypeError: Cannot set property 'innerHTML' of null at
XMLHttpRequest.xmlhttp.onreadystatechange




function showreports() {

    var str = document.getElementById("p").value;

    var str1 = document.getElementById("t").value;

    var str2 = document.getElementById("sem").value;

    var str3 = document.getElementById("ses").value;





    if (str == 0) {

        document.getElementById("txtHint").innerHTML = "";

        return;

    } else {

        var xmlhttp = new XMLHttpRequest();

        xmlhttp.onreadystatechange = function () {

            if (this.readyState == 4 && this.status == 200) {

                document.getElementById("txtHint").innerHTML = this.responseText;

            }

        };

        xmlhttp.open("GET", "get_reports.php?p=" + str, true);

        xmlhttp.send();

    }

}





javascript ajax







share|improve this question









New contributor




Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











I am trying to pass 4 arguments from a drop-down to Ajax but i get the following error:




Uncaught TypeError: Cannot set property 'innerHTML' of null at
XMLHttpRequest.xmlhttp.onreadystatechange




function showreports() {

    var str = document.getElementById("p").value;

    var str1 = document.getElementById("t").value;

    var str2 = document.getElementById("sem").value;

    var str3 = document.getElementById("ses").value;





    if (str == 0) {

        document.getElementById("txtHint").innerHTML = "";

        return;

    } else {

        var xmlhttp = new XMLHttpRequest();

        xmlhttp.onreadystatechange = function () {

            if (this.readyState == 4 && this.status == 200) {

                document.getElementById("txtHint").innerHTML = this.responseText;

            }

        };

        xmlhttp.open("GET", "get_reports.php?p=" + str, true);

        xmlhttp.send();

    }

}





javascript ajax




javascript ajax






share|improve this question









New contributor




Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited Nov 8 at 10:06









Bartosz Zasada

2,41521021




2,41521021






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asked Nov 8 at 9:54









Nouman Haroon

11




11




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Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor





Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Nouman Haroon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 1




    Where is your html? Seems you haven't defined txtHint
    – B001ᛦ
    Nov 8 at 9:57
















  • 1




    Where is your html? Seems you haven't defined txtHint
    – B001ᛦ
    Nov 8 at 9:57










1




1




Where is your html? Seems you haven't defined txtHint
– B001ᛦ
Nov 8 at 9:57






Where is your html? Seems you haven't defined txtHint
– B001ᛦ
Nov 8 at 9:57



















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