Jquery限制文本框输入

引用 ：http://www.cnblogs.com/xdp-gacl/p/3467245.html


// ----------------------------------------------------------------------
 2 // <summary>
 3 // 限制只能输入数字
 4 // </summary>
 5 // ----------------------------------------------------------------------
 6 $.fn.onlyNum = function () {
 7     $(this).keypress(function (event) {
 8         var eventObj = event || e;
 9         var keyCode = eventObj.keyCode || eventObj.which;
10         if ((keyCode >= 48 && keyCode <= 57))
11             return true;
12         else
13             return false;
14     }).focus(function () {
15     //禁用输入法
16         this.style.imeMode = ‘disabled‘;
17     }).bind("paste", function () {
18     //获取剪切板的内容
19         var clipboard = window.clipboardData.getData("Text");
20         if (/^\d+$/.test(clipboard))
21             return true;
22         else
23             return false;
24     });
25 };

 1 // ----------------------------------------------------------------------
 2 // <summary>
 3 // 限制只能输入字母
 4 // </summary>
 5 // ----------------------------------------------------------------------
 6 $.fn.onlyAlpha = function () {
 7     $(this).keypress(function (event) {
 8         var eventObj = event || e;
 9         var keyCode = eventObj.keyCode || eventObj.which;
10         if ((keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122))
11             return true;
12         else
13             return false;
14     }).focus(function () {
15         this.style.imeMode = ‘disabled‘;
16     }).bind("paste", function () {
17         var clipboard = window.clipboardData.getData("Text");
18         if (/^[a-zA-Z]+$/.test(clipboard))
19             return true;
20         else
21             return false;
22     });
23 };

 1 // ----------------------------------------------------------------------
 2 // <summary>
 3 // 限制只能输入数字和字母
 4 // </summary>
 5 // ----------------------------------------------------------------------
 6 $.fn.onlyNumAlpha = function () {
 7     $(this).keypress(function (event) {
 8         var eventObj = event || e;
 9         var keyCode = eventObj.keyCode || eventObj.which;
10         if ((keyCode >= 48 && keyCode <= 57) || (keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122))
11             return true;
12         else
13             return false;
14     }).focus(function () {
15         this.style.imeMode = ‘disabled‘;
16     }).bind("paste", function () {
17         var clipboard = window.clipboardData.getData("Text");
18         if (/^(\d|[a-zA-Z])+$/.test(clipboard))
19             return true;
20         else
21             return false;
22     });
23 };

1 $(function () {
2     // 限制使用了onlyNum类样式的控件只能输入数字
3     $(".onlyNum").onlyNum();
4     //限制使用了onlyAlpha类样式的控件只能输入字母
5     $(".onlyAlpha").onlyAlpha();
6     // 限制使用了onlyNumAlpha类样式的控件只能输入数字和字母
7     $(".onlyNumAlpha").onlyNumAlpha();
8    });

1  <ul>
2         <li>只能输入数字：<input type="text" class="onlyNum" /></li>
3         <li>只能输入字母：<input type="text" class="onlyAlpha" /></li>
4         <li>只能输入数字和字母：<input type="text" class="onlyNumAlpha" /></li>
5  </ul>