var div = document.createElement('DIV');
            div.id = 'jshr_d_' + id;
            div.style.position = 'absolute';
            div.style.visibility = 'hidden';
            div.innerHTML = 
                '<form enctype="multipart/form-data"></form>' + // stupid IE, MUST use innerHTML assignment :-(
                '<iframe src="javascript:\'\'" name="jshr_i_' + id + '" style="width:0px; height:0px; overflow:hidden; border:none"></iframe>';
            var form = div.getElementsByTagName('FORM')[ 0 ];
            var iframe = div.getElementsByTagName('IFRAME')[ 0 ];
...
sv.enctype  = form.enctype;  form.enctype = "multipart/form-data";
            sv.action   = form.action;   form.action = url;
            sv.method   = form.method;   form.method = method;
            sv.target   = form.target;   form.target = iframe.name;
            sv.onsubmit = form.onsubmit; form.onsubmit = null;
            form.submit();