用javascript實現簡單的用戶登錄驗證
阿新 • • 發佈:2017-07-20
-c turn get https 沒有 驗證 utf-8 .com head
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 </head> 7 <body> 8 <script type="text/javascript"> 9 function check() { 10 if(document.getElementById("username").value=="") { 11 alert("沒有輸入用戶名!"); 12 return false; 13 } else if(document.getElementById("password").value=="") { 14 alert("沒有輸入密碼!"); 15 return false; 16 } else { 17 alert("提交成功!") 18 return true; 19 } 20 } 21 </script> 22 <form name="form1"> 23 <input type="text" id="username"> 24 <input type="password" id="password" > 25 <input type="submit" onclick="check()"> 26 </form> 27</body> 28 </html>
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用javascript實現簡單的用戶登錄驗證