polyfill html5 input "form" attribute -

i use markup like

<input type="text" form="myform" name="inp1" /> <form id="myform" name="myform">     ...         </form> 

now realized doesn't work oldie , therefore searching html5 polyfill, didn't found 1 google.

anyone aware of lib or polyfill covers html5 feature?

i wrote polyfill emulate such feature duplicating fields upon form submission, tested in ie6 , works fine.

http://jsfiddle.net/hbxk4e61/

(function($) {   /**    * polyfill html5 form attr    */    // detect if browser supports   var sampleelement = $('[form]').get(0);   var isie11 = !(window.activexobject) && "activexobject" in window;   if (sampleelement && window.htmlformelement && sampleelement.form instanceof htmlformelement && !isie11) {     // browser supports it, no need fix     return;   }    /**    * append field form    *    */   $.fn.appendfield = function(data) {     // form     if (!this.is('form')) return;      // wrap data     if (!$.isarray(data) && data.name && data.value) {       data = [data];     }      var $form = this;      // attach new params     $.each(data, function(i, item) {       $('<input/>')         .attr('type', 'hidden')         .attr('name', item.name)         .val(item.value).appendto($form);     });      return $form;   };    /**    * find input fields form attribute point jquery object    *     */   $('form[id]').submit(function(e) {     // serialize data     var data = $('[form='+ this.id + ']').serializearray();     // append data form     $(this).appendfield(data);   }).each(function() {     var form = this,       $fields = $('[form=' + this.id + ']');      $fields.filter('button, input').filter('[type=reset],[type=submit]').click(function() {       var type = this.type.tolowercase();       if (type === 'reset') {         // reset form         form.reset();         // elements outside form         $fields.each(function() {           this.value = this.defaultvalue;           this.checked = this.defaultchecked;         }).filter('select').each(function() {           $(this).find('option').each(function() {             this.selected = this.defaultselected;           });         });       } else if (type.match(/^submit|image$/i)) {         $(form).appendfield({name: this.name, value: this.value}).submit();       }     });   });   })(jquery);