Ajax verification username and password retrieval reference

1 // JavaScript document 2 function chkname (form) {3 var user = form. user. value; 4 If (user = '') {5 alert ('enter your username'); 6 form. user. focus (); 7 return false; 8} else {9 var url = "foundpwd. PHP? User = "+ User; 10 XMLHTTP. open ("get", URL, true); 11 XMLHTTP. onreadystatechange = function () {12 if (XMLHTTP. readystate = 4) {13 var MSG = XMLHTTP. responsetext; 14 if (MSG = '0') {15 alert ('this user does not exist, please search again! '); 16 form. user. select (); 17 return false; 18} else {19 document. getelementbyid ('first '). style. display = 'none'; 20 document. getelementbyid ('second '). style. display = ''; 21 document. getelementbyid ('question '). innerhtml = MSG; 22} 23} 24} 25 XMLHTTP. send (null); 26} 27} 28 function chkanswer (form) {29 var user = document. getelementbyid ('user '). value; 30 var answer = form. answer. value; 31 if (answer = '') {32 Lert ('Enter the prompt question '); 33 form. Answer. Focus (); 34 return false; 35} else {36 var url = "foundpwd. php? User = "+ User +" & Answer = "+ answer; 37 XMLHTTP. open ("get", URL, true); 38 XMLHTTP. onreadystatechange = function () {39 if (XMLHTTP. readystate = 4) {40 var MSG = XMLHTTP. responsetext; 41 if (MSG = '0') {42 alert ('problem answering error'); 43 form. answer. select (); 44 return false; 45} else {46 document. getelementbyid ('second '). style. display = 'none'; 47 document. getelementbyid ('third '). style. display = ''; 48} 49} 50} 51 XMLHTTP. send (Nu Ll); 52} 53} 54 function chkpwd (form) {55 var user = document. getelementbyid ('user '). value; 56 var pwd1 = form. pwd1.value; 57 var pwd2 = form. pwd2.value; 58 If (pwd1 = '') {59 alert ('enter password'); 60 form. pwd1.focus (); 61 Return false; 62} 63 If (pwd1.length <6) {64 alert ('incorrect password entered '); 65 form. pwd1.focus (); 66 return false; 67} 68 if (pwd1! = Pwd2) {69 alert ('two passwords are not equal '); 70 form. pwd2.select (); 71 return false; 72} 73 var url = "foundpwd. php? User = "+ User +" & Password = "+ pwd1; 74 XMLHTTP. open ("get", URL, true); 75 XMLHTTP. onreadystatechange = function () {76 if (XMLHTTP. readystate = 4) {77 var MSG = XMLHTTP. responsetext; 78 If (MSG = '1') {79 alert ('password modified successfully, please log on again '); 80 window. close (); 81} else {82 alert (MSG); 83} 84} 85} 86 XMLHTTP. send (null); 87}