demo1.html
<html> <head> <title> </title> </title> <script type =“ text/javascript”>函數myCheck（）{for（var i = 0; i <document.form1.elements.length-length-1; i ++）{if（document.form1.form1.elements [i] elements [i] .value =======“”） document.form1.ements [i] .focus（）;返回false; }}返回true; } </script> </head> <身體> <形式名稱=“ form1”方法=“ post” action =“ page2.html” onsubmit =“ return myCheck（）”>用戶名：<input type type =“ text” text =“ text” name =“ username”> <br> <br> <br> <br> <br> <br> <but tput type =“ type =“提交” value =“> </form> </hody> </html> demo2.html <script language =“ javaScript”> <！ - function unfortiss1（frm）{if（document.frm.word.value = = = = = =“” method="POST" action="" name="frm" onsubmit="return submit1(this);"><select name="select0"> <option value="0">請選擇一個類別</option><option value="1">新聞</option><option value="2">產品</option><option value="3">留言</option></select><input type="text" name="word" size="20" style =“高度：19px;”> <input type =“無線電” name =“ sea_cat” value =“標題”>標題<input type =“無線電” name =“ sea_cat” value =“ value =”>內容<input類型=“demo3.html
<script type =“ text/javascript”>函數beforesubmit（form）{if（form.username.value ==''）{alert（'用戶名不能為空！''）; form.username.focus（）; return false;} if（fors.pass.pass.value.value =====''''''''''''''''''''密碼不能為空！ false;} if（form.pass.value.length <6）{arter（'密碼至少為6位，請重新輸入！'）; form.pass.pass.focus（）; return false;} if（form.pass.valword.value！= form.pass.pass.pass.valword2.value） <tegend> </ligend> <形式方法=“ post” name =“ form” action =“ user.do？method = register” onsubmit =“ return beforesubmit（this）;”> <table cellpacing =“ 0” cellpadding =“ 0”> value =“”> </label> </td> </tr> <tr> <td> <td> <label>密：<input type type type =“ password” name =“ password” valit <tr> <td> <input value =“ type =“ submit”> <input type =“ reset”值=“重置”> </td> </tr> </tr> </table> </table> </form> </fieldset> </fieldset>以上這篇js判斷所有表單項不為空則提交表單的實現方法就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持武林網。 ，也希望大家多多支持武林網。