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XMLHttpRequest, url file not being called


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I have a Java script named “modifymember.js”

If contains a function named “function showmember(str)”.

This function calls file “getmemberlastname.php” passing it a string with the member’s last name as a parameter

The function code looks like this:

 function showmember(str)


  if(str.length == 0)






var xmlhttp = new XMLHttpRequest();

            var rtn = "getmemberlastname.php?q=" + str; 

             xmlhttp.onreadystatechange = function()


                        alert("this.readyState = " + this.readyState + " this.status = " + this.status);

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


                                    var responsedata = jQuery.parseJSON(this.responseText);


                        document.getElementById("userid").value = responsedata[1];

                                    document.getElementById("lastname1").value = responsedata[3];

                                    document.getElementById("firstname1").value = responsedata[4];




             xmlhttp.open("PUT", rtn, true);




When the str contains an apostrophe getmemberlastname.php does not get called.

Without an apostrophe it does get called and works correctly.

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