事件取消
- 在事件中执行return false; 则可以将当前事件取消掉
表单提交事件 onsubmit
- 当表单提交时触发
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> <style type="text/css"> span{ visibility: hidden; } .ok{ visibility: hidden; } .err{ visibility: visible; } </style> <script type="text/javascript"> function check1(){ var i1 = document.getElementById("i1"); var reg = /^w{8,16}$/; s1.className = reg.test(i1.value)?"ok":"err"; //如果校验成功返回true反之返回false return reg.test(i1.value)?true:false; } function check2(){ var i2 = document.getElementById("i2"); var reg = /^w{8,16}$/; s2.className = reg.test(i2.value)?"ok":"err"; return reg.test(i2.value)?true:false; } </script> </head> <body> <a onclick="return confirm('确定要离开？');" href="http://baidu.com">超链接</a> <form action="http://baidu.com" onsubmit="return check1()+check2()==2;"> <input type="text" id="i1" placeholder="用户名" onblur="check1()"> <span id="s1">错误格式，请重新输入</span><br> <input type="text" id="i2" placeholder="密码" onblur="check2()"> <span id="s2">错误格式，请重新输入</span><br> <input type="submit" value="登录"> </form> </body> </html>