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While selecting combobox value display the data from database using Ajax and jsp

First Create table in database create table studentinfo (     name varchar(20),     branch varchar(20),     year varchar(4),     email varchar(20) ) insert into studentinfo values('Satyam','CSE','2013','satyam@gmail.com') insert into studentinfo values('Anand','CSE','2013','anand@gmail.com') Now create home.jsp page <%@page contentType="text/html" pageEncoding="UTF-8"%> <! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" > < html > < head > < title > Jsp Page </ title > < script > 1:   2: function showuser(str) 3: { 4: var xreq; 5: if (str== "" ) 6: { 7: document.getElementById( "showtext" ).innerHTML= "Plase Select Name" ; 8: return ; 9: } 10:   ...
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Check user name available or already exists in database while creating Registration form in jsp using AJAX like gmail

First Create  login table in sql server create table login (     name varchar(20),     password varchar(20) ) insert into login values('dilip','niit') Now Create jsp page: ajaxcheck.jsp <%@page contentType= "text/html" pageEncoding= "UTF-8" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" > <html> <head><title>welcome</title> <script language= "javascript" > reqObj= null ; function varify(){ document.getElementById( "res" ).innerHTML= "Checking" ; if (window.XMLHttpRequest){ reqObj= new XMLHttpRequest(); } else { reqObj= new ActiveXObject( "Microsoft.XMLHTTP" ); } reqObj.onreadystatechange=process...
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