<script type="text/javascript">
function makeCheck() {

    var objekt = getElementById("formularzyk");
    
    var ilosc = objekt.length;
    
    for (i=0; i<ilosc; i++) {
        var type = objekt.elements[i].type;

        if (type=="checkbox") {
            objekt.elements[i].checked = true;
        }
    }
}
</script>

        <form action="email.php" method="post" name="formularzyk" id="formularzyk">

        
        <table width="500" border="1" cellpadding="0" cellspacing="0">
        
          <tr>
            <th scope="col" width="300">list</th>
            <th scope="col" width="100">send e-mail?</th>
          </tr>
          
                    
              <tr>
                <td class="data" valign="middle">
                    <a href="javascript:popup('user_profile.php',300,500)">t ta (tadek)</a>

                </td>
                <td class="data" valign="middle">
                    <input name="option" type="checkbox" value="1" />
                </td>
              </tr>
              
                    
          <tr valign="bottom">
            <td colspan="4" class="bottom" valign="bottom">
            <div style="float: right; height:22px; line-height:22px; padding-right:16px;">
                <a href="makeCheck(this.form)">zaznacz wszystko</a>

                &nbsp;&nbsp;&nbsp;
            </div></td>
          </tr>
          
        </table>
        
        <br />
    </div>
    
        <div>&nbsp;</div><div>&nbsp;</div><h3 class="red">E-mail text</h3><div>&nbsp;</div>
        
        
                
                <table border="0" width="500">

                                
                        <tr>
                            <td align="right">
                                <b>subject:</b>
                            </td>
                            <td align="left">
                                <input type="text" name="subject" size="70" maxlength="100" value="" " class="input_dark" />
                            </td>
                        </tr>

                
                                
                        <tr>
                            <td align="right">
                                <b>text:</b>
                            </td>
                            <td align="left">
                                <textarea name="text" cols="90" rows="10"  class="input_dark"></textarea>
                            </td>
                        </tr>

                
                                </table>
                <div align="left">
                    
            <br/>
                <input type="submit" name="submit" value="submit" class="input_bn" />
        
                <input type="reset" value="reset" class="input_bn" />
            </form>

    var objekt = document.getElementById("formularzyk");

               <a href="#" onclick="makeCheck(this.form); return false;">zaznacz wszystko</a>

function makeCheck(argForm)

    var objekt = document.getElementById(argForm);

               <a href="#" onclick="makeCheck('formularzyk'); return false;">zaznacz wszystko</a>

<script type="text/javascript">
function makeCheck() {

    var objekt = document.getElementById("formularzyk");
    
    var ilosc = objekt.length;
    
    for (i=0; i<ilosc; i++) {
        var type = objekt.elements[i].type;

        if (type=="checkbox") {
            objekt.elements[i].checked = true;
        }
    }
}
</script>

<a href="#" onclick="makeCheck(); return false;">zaznacz wszystko</a>