javascript实现文本框标签验证的实例代码
网络 2018-11-12 1134
具体代码如下所述：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | < !DOCTYPE html > <html lang = "en" > <head > <meta charset = "UTF-8" > <title > Document < /title> </head > <style type = "text/css" > body { background: #ccc; } label { width: 100px; display: inline - block; } span { color: red; }.container { margin: 100px auto; width: 400px; padding: 50px; line - height: 40px; } span { margin - left: 30px; font - size: 12px; } < /style> <body> <div class="container"> <label>姓名不能为空</label > <input type = "text"id = "inp1" > <span > </span><br/ > <label > phone不能为空 < /label><input type="text" id="inp2"><span></span > <br / ></div> <script> / / 失去焦点后判断用户输入是否为空 var inp1 = document.getElementById("inp1"); inp1.onblur = function() { if (trim(this.value) === "") { alert("输入不能为空"); } else { alert("输入正确"); } }; function trim(str) { return str.replace(/^\s+|\s+$/g, ""); } var inp2 = document.getElementById("inp2"); inp2.onblur = function(e) { if (inp2.value == "4444") { alert("正确"); e.stopPropagation(); } else { alert("错误") } }; < /script> </body > </html> |
总结
以上所述是小编给大家介绍的javascript实现文本框标签验证的实例代码
