下拉框输入手机号

 

//手机数字限字

手机号码：<input type="text" id="txtPhoneNumber" value="" /> <script type="text/javascript"> var oTxt = document.getElementById('txtPhoneNumber'); oTxt.onblur = function () { var num = this.value; if (isNaN(num) || num.length != 11) { alert('手机号码长度不正确'); } else { var prefix = num.substring(0, 2); if (prefix == "13" || prefix == "15" || prefix == "17" ||prefix=="18" ) { alert("手机号码类型正确"); } else { alert("你输入的手机号码有误"); } } } </script>

 

//获得当前时间

<a id="demo" href="#">显示当前日期</a> <span id="date"></span> <script type="text/javascript"> var lnk = document.getElementById('demo'); var oSpan = document.getElementById('date'); lnk.onclick = function () { oSpan.innerHTML = new Date().toLocaleString(); if(e &&e.preventDefault){ e.preventDefault(); }else { window.event.returnValue = false; } } </script>

 

//select下拉框

<script type="text/javascript"> //写法1 var displayArr = ['苹果', '香蕉', '绿树', '狗狗']; //方法2 var valueArr = []; valueArr.push('apple'); valueArr.push('banana'); //push=List.Add(); valueArr.push('dog'); valueArr.push('tree'); document.write("<select>") for (var i = 0; i < 4; i++) { document.write( "<option >value='" + valueArr[i] + "'>" + displayArr[i] +"</option>"); } document.write("</select>"); </script> </body>