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Validation Rule for checkboxes

Started 14 years ago by popuskin | 3 posts |


  1. popuskin
    Member

    Hey People,

    I have checkboxes with 8 items. I only want users to select not more than 3 items.
    Where can I set this? I am a php developer.

    Thanks

    Posted 14 years ago #

  2. redityo

    Hi,

    You can put the custom validation code in "includes/post-functions.php" file and use the method that posted in here :

    http://www.appnitro.com/forums/topic/require-2-of-5-multiple-choice-answers#post-7367

    MachForm Support

    Posted 14 years ago #

  3. popuskin
    Member

    Hi redityo,

    Thanks for your prompt response but I would appreciate a more direct approach to this issue. Below are my validation codes and the checkbox itself. Please explain how and what I should do.

    <HTML>
    <HEAD>
    <TITLE> New Document </TITLE>

    </HEAD>

    <BODY>
    <html>
    <head>
    <title></title>
    <META NAME="DESCRIPTION" CONTENT="">
    <META NAME="KEYWORDS" CONTENT="">

    <script type="text/javascript">
    function chkcontrol(j) {
    var total=0;
    for(var i=0; i < document.form1.ckb.length; i++){
    if(document.form1.ckb[i].checked){total = total +1;}
    if(total > 3){
    alert("Please Select only three")
    document.form1.ckb[j].checked = false ;
    return false;
    }
    }
    } </script>
    </head>

    <body topmargin=''0''; >

    <form name=form1 method=post action=check.php>
    <table border=''0'' width=''250'' cellspacing=''0'' cellpadding=''0'' align=center>

    <tr bgcolor=''#ffffcc''><td > </td><td ><b>Choice</b></td></tr>
    <tr bgcolor=''#f1f1f1'' ><td ><input type=checkbox name=ckb value=1 onclick=''chkcontrol(0)'';></td><td >PHP</td></tr>
    <tr bgcolor=''#ffffff'' ><td ><input type=checkbox name=ckb value=2 onclick=''chkcontrol(1)'';></td><td >Perl</td></tr>
    <tr bgcolor=''#f1f1f1'' ><td ><input type=checkbox name=ckb value=3 onclick=''chkcontrol(2)'';></td><td >MySQL</td></tr>
    <tr bgcolor=''#ffffff'' ><td ><input type=checkbox name=ckb value=4 onclick=''chkcontrol(3)'';></td><td >ASP</td></tr>
    <tr bgcolor=''#f1f1f1'' ><td ><input type=checkbox name=ckb value=5 onclick=''chkcontrol(4)'';></td><td >JavaScript</td></tr>
    <tr bgcolor=''#ffffff'' ><td ><input type=checkbox name=ckb value=6 onclick=''chkcontrol(5)'';></td><td >CSS</td></tr>
    <tr bgcolor=''#f1f1f1'' ><td ><input type=checkbox name=ckb value=7 onclick=''chkcontrol(6)'';></td><td >HTML</td></tr>
    <tr bgcolor=''#ffffff'' ><td ><input type=checkbox name=ckb value=8 onclick=''chkcontrol(7)'';></td><td >Photo Shop</td></tr>
    </table></form>
    </body>
    </html>
    </BODY>
    </HTML>

    Posted 14 years ago #

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