Posted in Javascript onMay 28, 2014
开发一个注册的HTML页面, 用于搜集用户的注册信息。包括: 姓名(不能为空), 年龄(必须超过17岁), 体重(30-150kg), 班级(下拉列表),登陆密码(至少8位长)、确认密码(和登录密码一致),Email(不能为空) , 电话,QQ, 个人简历等信息。 并针对这些表的元素来创建相应的验证,如果检测到错误, 在输入框后面用红色的字显示错误。要用到前面几节学习过的单行文本输入框text、下拉列表框select、密码输入框password、多行文本输入框textarea。这是一个较实用的用户注册表单.。
register.html:
<!doctype html> <html> <head> <meta charset="utf-8"> <title>实验2</title> <link href="check.css" rel="stylesheet" type="text/css"> <script type="text/javascript" src="load.js"> </script> </head> <!--return validate()和validate()在于是否清空表单--> <body onload="load_greeting()"> <form id="test" align="left" onSubmit="return validate()"> <table> <tr> <td>Name*:</td> <td><input type="text" name="Name" id="name" size="20" onChange='check("name")'></td> <td id="nameCheck" class="check" hidden="true">*姓名不能为空</td> </tr> <tr> <td>Age:</td> <td><input type="text" name="Age" id="age" size="20" onChange='check("age")'></td> <td id="ageCheck" class="check" hidden="true">*年龄不能小于17岁</td> </tr> <tr > <td>weight:</td> <td><input type="text" name="weight" id="weight" size="20" onChange='check("weight")'></td> <td id="weightCheck" class="check" hidden="true">*体重范围为30~150KG</td> </tr> <tr> <td>Class:</td> <td><select id="class" name="class"> <option>class0</option> <option>class1</option> <option>class2</option> <option>class3</option> </select> </td> </tr> <tr> <td>Password*:</td> <td><input type="password" name="Password" id="password" size="20" onChange='check("password")'></td> <td id="passwordCheck" class="check" hidden="true">*password length less than 8</td> </tr> <tr> <td>Confirm Password*:</td> <td><input type="password" name="cpassword" id="cpassword" size="20" onChange='check("cpassword")'></td> <td id="cpasswordCheck" class="check" hidden="true">*Two passwd is not same</td> </tr> <tr > <td>Email*:</td> <td><input type="email" name="email" id="email" size="20" onChange='check(this.id)'></td> <td id="emailCheck" class="check" hidden="true">*电子邮件名非法!</td> </tr> <tr> <td>TEL:</td> <td><input type="text" name="TEL" id="TEL" size="20"></td> </tr> <tr> <td>QQ:</td> <td><input type="text" name="QQ" id="QQ" size="20"></td> </tr> <tr> <td>Personal Information:</td> <td><textarea rows="10" cols="19"></textarea></td> </tr> <tr> <td colspan="3"> <input type="submit" name="submit"> <input type="reset" name="reset"> </td> </tr> </table> </form> </body> </html>
check.css:
td.check{ color:#C00; font-weight:bold; }
load.js:
function check(str) { var x = document.getElementById(str); var y = document.getElementById(str+"Check"); //alert("check!"); if(str=="name") { if(x.value=="") y.hidden = false; else y.hidden = true; } else if(str=="age") { if(isNaN(x.value) || x.value < 17) y.hidden = false; else y.hidden = true; } else if(str=="weight") { x = x.value; if(isNaN(x) || x < 30 || x > 150) y.hidden = false; else y.hidden = true; } else if(str=="password") { x = x.value.length; if(x < 8) { y.hidden = false; //alert("check!"); } else y.hidden = true; } else if(str=="cpassword") { var z = document.getElementById("password").value; x = x.value; if(x != z) y.hidden = false; else y.hidden = true; } else if(str=="email") { x = x.value.indexOf("@") if(x == -1) y.hidden = false; else y.hidden = true; } return y.hidden; } function validate() { var arr=["name", "age", "weight", "password", "cpassword", "email"]; var i = 0; submitOK = true; while(i <= 5) { if(!check(arr[i])) { alert(arr[i]+" wrong!"); submitOK = false; break; } i++; } if(submitOK) { alert("提交成功!"); return true; } else { alert("提交失败"); return false; } } function load_greeting() { //alert("visit \n"); }
HTML页面登录时的JS验证方法
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