6.使用重置按钮

<form name=form1>
<input type=reset name=reset1 value="rest form">
</form>
<script>
document.write("表单reset1的类型:"+document.form1.reset1.type+"<br>")
document.write("表单reset1的名称:"+document.form1.reset1.name+"<br>")
document.write("表单reset1的值:"+document.form1.reset1.value+"<br>")
</script>

7.使用提交按钮

<form name=form1>
<input type=submit name=submit1 value="submit form">
</form>
<script>
document.write("表单submit1的类型:"+document.form1.submit1.type+"<br>")
document.write("表单submit1的名称:"+document.form1.submit1.name+"<br>")
document.write("表单submit1的值:"+document.form1.submit1.value+"<br>")
</script>

8.使用复选按钮

<form name=form1>
<input type=checkbox name=cb1 >computer savvy?
</form>
<script>
document.write("表单cb1的类型:"+document.form1.cb1.type+"<br>")
document.write("表单cb1是否被选择?:"+document.form1.cb1.checked+"<br>")
document.write("表单cb1的名称:"+document.form1.cb1.name+"<br>")
</script>

9.使用单选按钮

<form name=form1>
<input type=radio name=radio1>male
<input type=radio name=radio1>female
</form>
<script>
document.write("第一个按钮被选择"+document.form1.radio1[0].checked+"<br>")
document.write("第二个按钮被选择"+document.form1.radio1[1].checked+"<br>")
document.write("按钮的名称"+ document.form1.radio1[0].name+"<br>")
document.write("按钮的个数"+document.form1.radio1.length)
</script>

10.使用选择列表

<form name=form1>
<select name=select1 size=4>
<option name=option1 value=lon>london,England</option>
<option name=option2 value=dub>Dublin,Ireland</option>
</select>
</form>
<script>
document.write("这个选择列表的名称"+document.form1.select1.name+"<br>")
document.write("这个选择列表的长度"+document.form1.select1.length+"<br>")
document.write("这个选择列表当前被选择的索引号"+document.form1.select1.selectedIndex+"<br>")
document.write("这个选择列表的尺寸"+document.form1.select1.size+"<br>")
</script>

11.验证表单的有效性

<script>
function validate(){
if(document.form1.text1.value!='1'||'2'||'3'||'4'){
alert("请输入1~4的整数")
}
}
</script>
<form name=form1>
请输入1~4的整数:
<input type=text name=text1 size=4 onchange=validate()>
</form>

12.控制表单焦点

<form name=form1>
<input type=text name=text1 value=where is you focus?><br>
<input type=text name=text2 value=is there?><br>
<input type=text name=text3 value=or maybe here?><br>
<input type=button name=button1 value="text box #1" onclick=document.form1.text1.focus()><br>
<input type=button name=button2 value="text box #2" onclick=document.form1.text2.focus()><br>
<input type=button name=button3 value="text box #3" onclick=document.form1.text3.focus()><br>
</form>

第十三章 使用分栏

第十四章 使用navigator

1.使用navigator对象

<script>
document.write("navigator对象的属性"+"<br>")
document.write("appcodename:"+navigator.appCodeName+"<br>")
document.write("appname::"+navigator.appName+"<br>")
document.write("appversion:"+navigator.appVersion+"<br>")
document.write("platform:"+navigator.platform+"<br>")
document.write("userAgent:"+navigator.userAgent+"<br>")
</script>
<script>
document.write("navigator对象的方法"+"<br>")
document.write("javaEnabled():"+navigator.javaEnabled())
</script>

2.检查用户的浏览器

<script>
if(navigator.appName.indexOf("Microsoft")!=-1){
document.write("用户浏览器是微软的IE浏览器"+"<br>")}
else if(navigator.appName.indexOf("Netscape")!=-1){
document.write("用户浏览器是netscape的netscape浏览器"+"<br>")}
if(navigator.appVersion.indexOf("4.0")!=-1){
document.write("you are using a version 4.0compatible browser")
}
else{
document.write("this browser is not 4.0 compliant")}
</script>

3.检测用户的操作系统

<script>
if (navigator.platform.indexOf("win32")!=-1){
document.write("you are using a computer running windows 95 or highter")}
else{
document.write("this computer is not running windows 95 or higher")}
</script>

4.使用location对象

<script>
document.write("location对象的属性"+"<br>")
document.write("hash"+location.hash+"<br>")
document.write("hostname"+location.hostname+"<br>")
document.write("host"+location.host+"<br>")
document.write("href"+location.href+"<br>")
document.write("port"+location.port+"<br>")
document.write("search"+location.search+"<br>")
</script>

重新加载网页
<form name=form1>
<input type=button name=button1 value=重新加载本页 onclick=location.reload>
</form>

5.使用cookie

<script>
finction makecookie(){
if(!document.cookie){
name=prompt("请输入你的姓名");
document.cookie="name="+name+";";}
}
</script>

<body onload=makecookie()>
<script>
function makecookie(){
if(!document.cookie){
name=prompt("请输入你的姓名")
document.cookie="name="+name+";";
namestart=document.cookie.indexOf("=");
nameend=document.cookieindexOf(";");
document.writeln("your name is:"+document.cookie.substring(namestart+1,nameend)+",br>")
}
}
</script>

出处：蓝色理想
责任编辑：moby

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