JS案例：判断今天是星期几
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<title>else if语句应用案例</title>
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<script type="text/javascript">
var date=new Date();
document.write("今天是：");
if(date.getDay()==1){
document.write("星期一");
}
else if(date.getDay()==2){
document.write("星期二");
}
else if(date.getDay()==3){
document.write("星期三");
}
else if(date.getDay()==4){
document.write("星期四");
}
else if(date.getDay()==5){
document.write("星期五");
}
else if(date.getDay()==6){
document.write("星期六");
}
else{
document.write("星期日");
}
</script>
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