1 <!DOCTYPE html>
2 <html>
3
4 <head>
5 <meta charset="UTF-8">
6 <title></title>
7 </head>
8
9 <body>
10 <form class="form-horizontal" style="margin-top: 100px;">
11 <div class="form-group">
12 <label>PHONE</label>
13 <input type="tel" class="userPhone" onkeyup="this.blur();this.focus();" maxlength="13" id="" placeholder="phone">
14 </div>
15 </form>
16
17 <script type="text/javascript">
18 var inputs = document.querySelector('.userPhone');
19 var oninput = onchange || oninput;
20 inputs.oninput = function() {
21 var str = inputs.value;
22 str = formatNum(str.replace(/\D/g, ''), true);
23 inputs.value = str;
24 }
25
26 function formatNum(num, isTel, count) {
27 isTel = isTel || 0;
28 count = count || 4;
29
30 if (isTel) {
31 num = '0' + num;
32 }
33
34 var patt = new RegExp('\\d{' + count + '}', 'g')
35 num = num.replace(patt, function($0) {
36 return $0 + ' ';
37 })
38
39 if (isTel) {
40 num = num.slice(1).trim()
41 }
42 return num;
43 }
44 </script>
45 </body>
46
47 </html>
