var upload_range=1;function traidntslot(num){if(upload_range<max_tr_upload){if(num==upload_range){var up=document.getElementById('tr_up');var dv=document.createElement("div");dv.innerHTML='<input  type="file" name="upfile_'+upload_range+'" size="54" onchange="traidntslot('+(upload_range+1)+')">';up.appendChild(dv);upload_range++;document.tr_upload.upload_range.value=upload_range}}}