没有提醒错误但无显示，但用hbuilder有效果

var myweek =1;//myweek表示星期几变量

switch(myweek)

{

            var myweek =1;//myweek表示星期几变量

    switch(myweek){

case 1:

document.write("周一");

break;

case 2:

document.write("周2");

break;

case 3:

document.write("周3");

break;

case 4:

document.write("周4");

break;

case 5:

document.write("周5");

break;

case 6:

document.write("周6");

break;

case 7:

document.write("周7");

break;

default:

document.write("???！");

}

}