I have a code (see it below). It works perfectly in Firefox: it saves submitted information after clicking __JL_SAVE button and keeps user on same page.
But in Internet Explorer & Opera it only redirects to index page (index.php) and doesn't save submitted information.
What can I do for solving this problem? Thanks.

Here is my code:

<form action=index.php id=mosForm method=post enctype=multipart/form-data>



    <fieldset>

        <legend><?=__JL_ABOUT_MYSELF?></legend>

        <span class=a onclick=showHideLegend('about_myself_1')><?=__JL_EDIT_BLOCK;?></span>

        <div id=about_myself_descr style=display: block><?=__JL_SELF_DESCR;?></div>

        <div id=about_myself_1 style=display: none><?php include html/about_myself_fill.php?></div>

        <div id=about_myself_2><?php include html/about_myself_show.php?></div>

    </fieldset>



    <fieldset>

        <legend><?=__JL_ABOUT_MYSELF?></legend>

        <span class=a onclick=showHideLegend('type_1')><?=__JL_EDIT_BLOCK;?></span>

        <?php if ($typ_block) {?>

            <?php /* <input type=checkbox id=jl_type_block name=jl_type_block <?php if ($roon_type_block) echo 'checked ';?> /> */ ?>

            <input type=checkbox id=jl_type_block name=jl_type_block disabled <?php  echo 'checked ';?> />

            <label for=jl_type_block><?=__JL_ON_BLOCK?></label>

        <?php } else {

            echo __JL_OFF_BLOCK;

        }?>



        <div id=about_myself_descr style=display: block><?=__JL_SELF_DESCR;?></div>



        <div id=type_1 style=display : none>

            <?php include html/type.php?>

        </div>

        <?php if ($typ_block) { ?>

            <div id=type_2>

                <?php include html/type_show.php?>

            </div>

        <?php } ?>

        </fieldset>



        <fieldset>

            <legend><?=__JL_INTEREST?></legend>

            <span class=a onclick=showHideLegend('interest_1')><?=__JL_EDIT_BLOCK;?></span>

            <?php if ($interest_block) {?>

                <input type=checkbox id=jl_interest_block name=jl_interest_block disabled <?php echo 'checked ';?> />

                <label for=jl_interest_block><?=__JL_ON_BLOCK?></label>

            <?php } else

                echo __JL_OFF_BLOCK;

            ?>

            <div id=interest_descr style=display:block><?=__JL_INTEREST_DESCR;?></div>

            <div id=interest_1 style=display:none>

                <?php include html/interest.php?>

            </div>

            <?php if ($interest_block) { ?>

                <div id=interest_2>

                <?php include html/interest_show.php?>

                </div>

            <?php } ?>

        </fieldset>





            <input type=submit name=save value=__JL_SAVE onClick=mosForm.submit(); />

            <input type=hidden name=option value=com_joomlove />

            <input type=hidden id=task name=task value=save_info />

            </form>

Full source available here: http://narkoz.pastebin.com/f4f036f5