请帮助我为此创建一个循环版本
[英]Please help me to create a loop version of this
问题描述
I have created the dropdown list in my index page i want to select the one value from that list and validate it if not selected any value the code for that. 
我已经在索引页面中创建了下拉列表，我想从该列表中选择一个值，如果未选择该代码的任何值，则对其进行验证。
<script> function Validate() { var b = document.getElementById("etnik"); var strUser = b.options[b.selectedIndex].value; var strUser1 = b.options[b.selectedIndex].text; if (strUser == 0) { alert("Sila isikan ruangan yang kosong."); } } function Validate1() { var a = document.getElementById("Jantina"); var strUser = a.options[a.selectedIndex].value; var strUser1 = a.options[a.selectedIndex].text; if (strUser == 0) { alert("Sila isikan ruangan yang kosong."); } } function Validate2() { var c = document.getElementById("warganegara"); var strUser = c.options[c.selectedIndex].value; var strUser1 = c.options[c.selectedIndex].text; if (strUser == 0) { alert("Sila isikan ruangan yang kosong."); } } </script>
<body> <form> <select id="Jantina" name="Jantina"> <option value='0'>Sila Pilih</option> <option value='1'>Lelaki</option> <option value='2'>Perempuan</option> </select> <br> <select id="etnik" name="etnik"> <option value='0'>Sila Pilih</option> <option value='1'>Melayu</option> <option value='2'>India</option> </select> <br> <select id="warganegara" name="warganegara"> <option value='0'>Sila Pilih</option> <option value='1'>Yes</option> <option value='2'>Tidak</option> </select> <input name="Simpan" type="submit" value="Simpan" onClick="Validate()" onclick="Validate1()" onclick="Validate2()"> </form> </body>
But i dont know how to make this to loop version. 但我不知道如何使此循环版本。 It will be pleasure for the help and idea. 希望得到帮助和想法。 TY (sorry for bad in english) TY（对不起，英语不好）
1 个解决方案
解决方案1
0 已采纳 2015-06-25 02:21:48
Notice that the only thing that is changing is the text in document.getElementById("...") . 请注意，唯一更改的是document.getElementById("...")的文本。 So you can use an array with the three text items: ["etnik","Jantina","warganegara"] . 因此，您可以将数组与三个文本项一起使用： ["etnik","Jantina","warganegara"] 。 And loop through them: 并遍历它们：
var array = ["etnik","Jantina","warganegara"];
for(var i = 0; i < array.length; i++)
{
var a = document.getElementById(array[i]);
var strUser = a.options[a.selectedIndex].value;
var strUser1 = a.options[a.selectedIndex].text;
if (strUser == 0) {
alert("Sila isikan ruangan yang kosong.");
}
}
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.