1.将函数用作方法
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>html5 Web Storage的localStorage完成的网站计数器功能</title>
</head>
<body>
<script type="text/javascript">
var myData={
name:"cheng",
weather:"sunny",
printMessages:function(){
document.writeln("hello"+this.name+".");
document.writeln("today is "+ this.weather+".");
}
};
myData.printMessages();
</script>
</body>
</html>
2.枚举数组内容
<script type="text/javascript">
//创建和填充数组
var myArray=[100,200,true]
myArray[1]="change";
for(var i=0;i<myArray.length;i++){
document.writeln(myArray[i]);
}
</script>
3.异常捕获
<script type="text/javascript">
try {
var myArray=[100,200,true];
var myArray1=myArray;
for(var i=0;i<myArray1.length;i++){
document.writeln(myArray1[i]);
}
}catch(e){
document.writeln("error"+e);
}finally{
document.writeln("state")
}
</script>
4.检查变量或属性是否为undefined或null
<script type="text/javascript">
var mydata={
name:"cheng",
city:null
};
if(!mydata.name){
document.writeln("name is null or undefined");
}else{
document.writeln("name is not null or undefined");
}
document.writeln("<br>");
if(!mydata.city){
document.writeln("city is null or undefined");
}else{
document.writeln("city is not null or undefined");
}
</script>