<head> <script type="text/javascript"> $("#sub1").click(function(){ var text1=$("#text1").val(); if(text1==""){ alert("不能为空!"); $("#text1").select(); $("#text1").focus(); }else{ $("#form1").submit(); } }) </script> </head> <body> <form id="form1" method="post" action=""> <input type=text id="text1"/> <input type="submit" id="sub1"搜索 value="提交"> </form> </body>
时间: 2024-08-08 10:35:47