发布于 2017-01-27 05:26:59 | 191 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
<!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>
td.check{
color:#C00;
font-weight:bold;
}
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");
}