學到這里給return的知識又回顧了下,無參無返回值的方法一般要得到結(jié)果,在方法里加個打印語句就行了。而調(diào)用有返回值的方法,需要return將值return出去,才能用這個結(jié)果
2019-05-29
var mydate=new Date();
document.write("當前時間:"+mydate+"<br>");
mydate.setTime( mydate.getTime() + 2* 60 * 60 * 1000);
document.write("推遲二小時時間:" + mydate);
mydate.setTime( mydate.setTime(7200000));
document.write("添加7200000毫秒后的時間為:" + mydate);
document.write("當前時間:"+mydate+"<br>");
mydate.setTime( mydate.getTime() + 2* 60 * 60 * 1000);
document.write("推遲二小時時間:" + mydate);
mydate.setTime( mydate.setTime(7200000));
document.write("添加7200000毫秒后的時間為:" + mydate);
2019-05-27
我以為根據(jù)tcon的三次父集找到con 然后在for 找到對應(yīng)html/css 然后獲取其下面的內(nèi)容
2019-05-24
var num=0;
function startCount() {
document.getElementById('count').value=num;
num=num+1;
setTimeout(startCount,1000)
}
function startCount() {
document.getElementById('count').value=num;
num=num+1;
setTimeout(startCount,1000)
}
2019-05-24
var attime;
function clock(){
var time=new Date();
attime=time.getHours()+":"+time.getMinutes()+":"+time.getSeconds();
document.getElementById("clock").value = attime;
}
setInterval("clock()",1000);
// setInterval(clock,1000);
function clock(){
var time=new Date();
attime=time.getHours()+":"+time.getMinutes()+":"+time.getSeconds();
document.getElementById("clock").value = attime;
}
setInterval("clock()",1000);
// setInterval(clock,1000);
2019-05-24
function openWebpage(){
alert("Welcome to imooc!")
window.open("http://idcbgp.cn","_blank","width=600 height=400")
}
alert("Welcome to imooc!")
window.open("http://idcbgp.cn","_blank","width=600 height=400")
}
2019-05-24
var score = "小明:87;小花:81;小紅:97;小天:76;小張:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";
var sum = 0;
for(let i = 0;i<score.split(";").length;i++){sum += parseInt((score.split(";"))[i].slice(3,5));}
document.write("班級總分:"+ sum +" 平均分:"+ sum/(score.split(";").length))
var sum = 0;
for(let i = 0;i<score.split(";").length;i++){sum += parseInt((score.split(";"))[i].slice(3,5));}
document.write("班級總分:"+ sum +" 平均分:"+ sum/(score.split(";").length))
var time = new Date();
var year = time.getFullYear();
var month = time.getMonth();
var date = time.getDate();
var week = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]
document.write(year+"年"+month+"月"+date+"日 "+week[time.getDay()] + "<br>");
var year = time.getFullYear();
var month = time.getMonth();
var date = time.getDate();
var week = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]
document.write(year+"年"+month+"月"+date+"日 "+week[time.getDay()] + "<br>");