php - firefox having "#;" in the addressbar -


why firefox(haven't tested in browser) has problems loading form values when #; in addressbar? if have <input type='radio' checked="checked">, presence of element in addressbar may lead input not getting checked(as expected)

how can avoid behavior?


example code:

    <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" dir="ltr" style="min-height:100%;">     <head>         <title>stuff2test</title>         <meta http-equiv="content-type" content="text/html; charset=utf-8" />     </head>     <body class="popup" >         <form action="" id="frm">             <a href="#;" onclick="alert('added');">add #; addressbar, , refresh</a>              <?php $rnd = mt_rand(1, 4); ?>              <label for="r_v1"> <input id="r_v1" type="radio" value="v1" <?php if($rnd==1){ echo 'checked="checked"';}?> name="r"></input> checked?</label>             <label for="r_v2"> <input id="r_v2" type="radio" value="v2" <?php if($rnd==2){ echo 'checked="checked"';}?> name="r"></input> checked?</label>             <label for="r_v3"> <input id="r_v3" type="radio" value="v3" <?php if($rnd==3){ echo 'checked="checked"';}?> name="r"></input> checked?</label>          </form>          <button onclick="getelementbyid('frm').submit();" type="button">submit</button>          <br/>         rnd: <?php echo $rnd;?>         <?php         if($rnd>0 && $rnd<=3){             echo "checkbox {$rnd} should checked";         }         ?>         <br/>          <?php             var_dump($_get);         ?>     </body> </html> 

edit2: cleaned code little, added echo

from reading comments on question, answer seems clear.

the problem firefox tries remember state of form when reload page, includes checkboxes checked , aren't. though vary default values in html on reload, firefox sees same form , ignores defaults set in html in favor of has saved before reload.

i've heard can disable behavior supplying http header cache-control: no-store, or specifying autocomplete="off" on form elements. have not tested either solution personally. or use javascript reset form on page load (either form object's reset() or explicitly setting each field's value).


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