function move(){

document.getElementById('tgt1').value = document.getElementById('Allocation').value;
document.getElementById('Allocation').value="";
document.getElementById("Send").disabled=true;

}
function invoke(but)
  {
   if(but==0)
    {
        document.myform.action="Alloc_Insert.do";
    }

<table><tr><center><td><input type="Submit" value="Allocate" id="Send"     onClick="invoke(0);move();" style="width:150px" style="font-size:100%"/></td></center></tr>    </table>

ResultSet rs=null;
        String Add=request.getParameter("tgt1");
        String user=(String) session.getAttribute("myusername");
        Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();Date d1 = new Date();
        String d1_str = new SimpleDateFormat("yyyy-MM-dd").format(d1);
        Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","system","tiger");
        PreparedStatement ps=con.prepareStatement("UPDATE SCOPE1 SET ALLOCATED='"+d1_str+"', SPECIALIST='"+user+"' WHERE DBID='"+Add+"'");
        con.setAutoCommit(true);
        int i=ps.executeUpdate();
        if(i==1)
                           {
             String redirectURL= "Update_Counts.jsp";
            response.sendRedirect(redirectURL);
                        }
                   else{

            out.print("retry");
                  }

function test(tg1){
  context = '${pageContext.request.contextPath}';
  var http_request = getXMLHttpRequest();
            if (!http_request) {
        alert('Giving up :( Cannot create an XMLHTTP instance');
        return false;
    }

    http_request.open("POST", context + "/ServletName?tgt1=" + tg1, true);
    http_request.onreadystatechange = function() {
        if (http_request.readyState == 4) {
            if (http_request.status == 200) {
                var response = http_request.responseText;
                //do something if you have a response from the servlet
            }
        }
    };
    http_request.send(null);
}

ResultSet rs=null;
String Add=request.getParameter("tgt1");
String user=(String) session.getAttribute("myusername");
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();Date d1 = new Date();
String d1_str = new SimpleDateFormat("yyyy-MM-dd").format(d1);
Connection con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","system","tiger");
PreparedStatement ps=con.prepareStatement("UPDATE SCOPE1 SET ALLOCATED='"+d1_str+"', SPECIALIST='"+user+"' WHERE DBID='"+Add+"'");
con.setAutoCommit(true);
int i=ps.executeUpdate();