我有这个代码$('#postinput').on('keyup',function(){vartxt=$(this).val();$.ajax({type:"POST",url:"action.php",data:'txt='+txt,cache:false,context:this,success:function(html){alert(html);}});});$('#postinput2').on('keyup',function(){vartxt2=$(this).val();$.ajax({type:"POST",url:"action.php",data:'txt2='+