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JSP form with checks

Discussion in 'JSP' started by brianmadden, Sep 20, 2012.

  1. brianmadden

    brianmadden New Member

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    Hello, I am trying to create a jsp form with 4 options the user can only select 2 of the four options and are blocked from selecting more and given a prompt if they try to. I am not sure how to create a check to see how many checkboxes they have used, I think I should be using an array and a loop but I am struggling to find a solution

    Code:
    <form ACTION="page2.jsp">
    
    Opt 1 <input type="checkbox" name="id" value="check1 +"> 
    Opt  2 <input type="checkbox" name="id" value="check2 +"> 
    Opt  3 <input type="checkbox" name="id" value="check3 +"> 
    Opt  4 <input type="checkbox" name="id" value="check4 +"> 
    
    <input type="submit" value="Submit">
    </form>
    
    They are then brought to another page that thanks them for choosing those options which I have stored in array.

    Code:
      <p><b> Thank you <u><%= session.getAttribute( "username" ) %> </u>for registering </b></p>
             
              <p>
                      <%String[] selections = request.getParameterValues("id");
                       session.setAttribute("id",selections);
                        if (selections != null && selections.length != 0) {
                     out.println("You have selected: ");
                    for (int i = 0; i < selections.length; i++) {
                    out.println(selections[i]);
                    }
                }
                %>
    
     
  2. brianmadden

    brianmadden New Member

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    I have been searching for a few check box solutions, and think I need to write an method that runs when the user presses the submit button

    Code:
      <script type="text/javascript">
    function validate(form) {
    
    var total=""
    for(var i=0; i < 2; i++){
    if(document.form1.id[i].checked)
    total +=document.form1.id[i].value + "\n"
    }
    if(total==""){
    alert("Please select an option")
    }
    else
    alert ("The options you have selected are: "+"\n"+total)
    
    return false;
    } </script>
    
     

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