js实现表单校验功能
本文实例为大家分享了js实现表单校验功能的具体代码,供大家参考,具体内容如下
1、所用到的三个事件:
onfocus(焦点聚焦事件)、onblur(焦点离开事件)、onkeyup(按键抬起的事件)
2、利用事件触发函数,函数中执行校验的信息。
3、利用checkform判断表单中的内容是否规范,如果规范submit按钮可以提交表单信息。
简单效果:
form中的代码:
<form action="demo.html" onsubmit="return checkForm()"> <div> <div class="text"> <p>用户名</p> <input id="value" onfocus="shoeTips('hint','用户名长度不能小于六')" onblur="hint_hide()" onkeyup="hint()" type="text" Name="Userame" placeholder="用户名" /> <span id="hint"></span> </div> <div class="text"> <p>密码</p> <input id="pass_value" onfocus="shoeTips('pass_hint','密码长度不能小于六')" onblur="pass_hide()" onkeyup="checkPass()" type="password" name="password" placeholder="密码" /> <span id="pass_hint"></span> </div> <div class="text"> <p>确认密码</p> <input id="passpass_value" onfocus="shoeTips('passpass_hint','两次密码要一致')" onblur="passpass_hide()" onkeyup="checkPassPass()" type="password" name="password" placeholder="确认密码" /> <span id="passpass_hint"></span> </div> <div class="text"> <p>邮箱</p> <input id="email" onfocus="shoeTips('email_hint','邮箱格式要正确')" onblur="emailHide()" onkeyup="emailCheck()" type="email" name="email" placeholder="邮箱" /> <span id="email_hint"></span> </div> <div class="text"> <p>手机号</p> <input id="phone" type="text" onfocus="shoeTips('phone_hint','格式为十一位数字的手机号')" onblur="phoneHide()" onkeyup="phoneCheck()" Name="Phone" placeholder="手机号"> <span id="phone_hint"></span> </div> <div class="submit"> <input type="submit" value="提交" /> </div> </div> </form>
js中的:
function shoeTips(spanId, tips) { var span = document.getElementById(spanId); span.innerHTML = tips; } /** * 校验用户名 */ function hint() { var value = document.getElementById("value").value; var hint = document.getElementById("hint"); if(value.length < 6) { hint.innerHTML = "用户名太短"; return false; } else { hint.innerHTML = "用户名合格"; return true; } } function hint_hide() { var hint = document.getElementById("hint"); hint.innerHTML = ""; } /** * 校验密码 */ function checkPass() { var value = document.getElementById("pass_value").value; var hint = document.getElementById("pass_hint"); if(value.length < 6) { hint.innerHTML = "密码太短"; return false; } else { hint.innerHTML = "密码格式合格"; return true; } } function pass_hide() { var hint = document.getElementById("pass_hint"); hint.innerHTML = ""; } /*** * 确认密码的校验 */ function checkPassPass() { var papavalue = document.getElementById("passpass_value").value; var value = document.getElementById("pass_value").value; var papahint = document.getElementById("passpass_hint"); if(papavalue != value) { papahint.innerHTML = "两次密码不一致"; return false; } else { papahint.innerHTML = ""; return true; } } function passpass_hide() { var papahint = document.getElementById("passpass_hint"); papahint.innerHTML = ""; } /** * 校验邮箱 */ function checkEmail(strEmail) { var emailReg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/; if ( emailReg.test(strEmail) ) { return true; } else { // alert("您输入的Email地址格式不正确!"); return false; } }; function emailCheck() { var emailValue = document.getElementById("email").value; var email_hint = document.getElementById("email_hint"); var flag = checkEmail(emailValue); if(flag) { email_hint.innerHTML = "邮箱格式正确"; return true; } else { email_hint.innerHTML = "邮箱格式错误"; return false; } } function emailHide() { var email_hint = document.getElementById("email_hint"); email_hint.innerHTML = ""; } /** * 校验手机号 */ function checkMobile( strMobile ) { //13588888888 var regu = /^[1][345678][0-9]{9}$/; var re = new RegExp(regu); if (re.test(strMobile)) { return true; } else { return false; } }; function phoneCheck() { var phone = document.getElementById("phone").value; var phone_hint = document.getElementById("phone_hint"); var flag = checkMobile(phone); if(flag) { phone_hint.innerHTML = "手机号格式正确"; return true; } else { phone_hint.innerHTML = "手机号格式错误"; return false; } } function phoneHide() { var phone_hint = document.getElementById("phone_hint"); phone_hint.innerHTML = ""; } function checkForm() { var flag = emailCheck() && checkPass() && checkPassPass() && hint() && phoneCheck(); return flag; }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持我们。
赞 (0)