Javascript validations problem

i have attached two jsp files 1.sports1.jsp and sports.jsp files Here when i run my sports.jsp file my validation works correctly but when my validation fails i am getting an alert window and i am reverting to next page. The thing is i want to stay in same page if validation fails. Do this favor for me. Thanks s advance

sports1.jsp file:-

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<HTML>
    <head>   
        <SCRIPT language="javascript">

function checkAll(field)
{
for (i = 0; i < field.length; i++)
    field[i].checked = true ;
}

function uncheckAll(field)
{
for (i = 0; i < field.length; i++)
    field[i].checked = false ;
}

function validate()
    {
    var chks = document.getElementsByName('checkk');
    var hasChecked = false;
    for (var i = 0; i < chks.length; i++)
    {
        if (chks[i].checked)
    {
        hasChecked = true;
        break;
    }
    }
    if (hasChecked == false)
    {
    alert("Please select atleast one Asset.");
    return false;
    }
    return true;
    }
function validate1()    
    { 
          if (document.myform.status.value=="0") 
     {
         alert("Please Select Status");
            return false;      
     }
        return true;
    }
 function validate2()
{

    validate1();
        validate();
} 

</script>
    </head>
    <body>

<FORM name="myform" method="POST" ACTION="sports.jsp" onsubmit="return validate2(this)">
<center>
<br>Select your AssetCode: </br>
<table>
<tr>
    <td>
        <input TYPE=checkbox name=checkk id="agree" VALUE=As10>
    </td>   
    <td>   
        As10
    </td>
    <td><select name="status">
<option value="0">Select</option>            
<option value="Activate">Activate</option>
<option value="Deactivate">Deactivate</option>
<option value="scrap">Scrap</option>

</select>
    </td>
    <td><INPUT TYPE=submit name=Convert Value="Convert" ></td>
</tr>

<tr>
    <td>
        <input TYPE=checkbox name=checkk id="agree" VALUE=As11>
    </td>   
    <td>   
        As11
    </td>

</tr>

<tr>
    <td>
        <input TYPE=checkbox name=checkk id="agree" VALUE=As12>
    </td>   

    <td>   
        As12
    </td>
</tr>

<tr>
    <td>
        <input TYPE=checkbox name=checkk id="agree" VALUE=As13>
    </td>   

    <td>   
        As13
    </td>
</tr>

<tr>
    <td>
        <input TYPE=checkbox name=checkk id="agree" VALUE=As14>
    </td>   

    <td>   
        As14
    </td>

</tr>
<tr>
    <td>

        <input type="button" name="SelectAll" value="SelectAll" onClick="checkAll(document.myform.checkk)">

    </td>
</tr>
<tr>
    <td>
        <input type="button" name="UnSelectAll" value="UnSelectAll" onClick="uncheckAll(document.myform.checkk)">

    </td>
</tr>
</table>
<br> 
</center>
</FORM>
</BODY>
</HTML>

sports.jsp file:-


<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<body>
<%! String[] asset; %>
<center><b>You have selected:</b> 
<% 
   asset = request.getParameterValues("checkk");
   if (asset != null) 
   {
      for (int i = 0; i < asset.length; i++) 
      {
         out.println ("<b>"+asset[i]+"<b>");
      }
   }
   else out.println ("<b>None<b>");
%>
</br>
<%
String selectedValue=request.getParameter("status");
out.println("Selected Status is: "+selectedValue);
%>
</center>
</body>
</html>

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