How to write javascripts

How to write javascripts

Dear sir,
How to write a java scripts? I have a one table in that i have a radio button and soon..And also i have a submit button.If i didnt select any radio button and click on a submit button i have to get a one popup message...else if i select a any one row and submitted it has to perform some operation wat i have used...so how to do this sir please help me sir.....
Thanks and Regards
Harini.
View Answers

June 7, 2010 at 4:13 PM

Hi Friend,

Try the following code:

1)form.jsp:

<%@page import="java.sql.*"%>
<script>
function validate(form) {
var op = -1;
for (i=form.radio.length-1; i > -1; i--) {
if (form.radio[i].checked) {
op = i; i = -1;
}
}
if (op == -1) {
alert("You must select a radio button");
return false;
}

return true;
}
</script>
<form name="form" method="post" action="getInfo.jsp" onsubmit="return validate(form);" >
<table border="1">
<tr><td></td>
<th>Id</th>
<th>Name</th>
<th>Address</th>
</tr>
<%
int i=0;
try{
Connection conn = null;
Class.forName("com.mysql.jdbc.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/register","root";, "root");
ResultSet rs = null;
Statement st=null;
st=conn.createStatement();
rs = st.executeQuery("select * from data");
while(rs.next()){ %>
<tr><td><input type="radio" name="radio" value=<%= rs.getString("id") %>></td>
<td><%= rs.getString("id") %></td>
<td><%= rs.getString("name") %></td>
<td><%= rs.getString("address") %></td>
</tr><%
i++;
}
}catch(SQLException e){ System.out.println(e.getMessage()); } %>
</table>
<input type="hidden" name="count" value="<%=i%>">
<input type="submit">
</form>

2)getInfo.jsp:

<%@page import="java.sql.*"%>
<%
String id=request.getParameter("radio");
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/register","root";, "root");
Statement st=conn.createStatement();
ResultSet rs = st.executeQuery("select * from data where id='"+id+"'");
if(rs.next()){
out.println("Your name is: "+rs.getString("name"));
}
%>

Thanks









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