<form action=""> <ul id="ul1"> <li><input type="text" class="txt"><input type="text" class="txt"></li> <li><input type="text" class="txt"><input type="text" class="txt"></li> <li><input type="text" class="txt"><input type="text" class="txt"></li> </ul> <input id="sbm" type="button" value="提交"> </form>