<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> </head> <body> <form action="" method="post" action="" onsubmit="return check_form(this)"> //这里不加return将不会触发 <input type="text" name="topic" placeholder="日记主题"><br> <textarea name="wznr" rows="6" placeholder="写点什么吧"></textarea><br> <input name="submit" type="submit" value="发表" > <input name="reset" type="reset" value="重置"> </form> <script> function check_form(form1){ if(form1.topic.value==""){ alert("日记主题不能为空！");form1.topic.focus();return false; } if(form1.wznr.value=="") { alert("内容不能为空!");form1.wznr.focus();return false; } } </script> </body> </html>
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转载自www.cnblogs.com/xuchangqi1/p/9245620.html
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