var getXqWeek = function (a, b, c) { 
var date1 = new Date(), date2 = new Date(a, b-1, c);
var d = Math.round((date1.valueOf() - date2.valueOf()) / 86400000); 
return Math.ceil((d + ((date2.getDay() + 1) - 1)) / 7 ); 
}; 
var Today = new Date();
var tY = Today.getFullYear();
var tM = Today.getMonth()+1;
var tD = Today.getDate();
var xQ = Today.getDay();
var day;
if(xQ==0) day = "<font color=#FF0000>星期日</font>";
if(xQ==1) day = "星期一";
if(xQ==2) day = "星期二";
if(xQ==3) day = "星期三";
if(xQ==4) day = "星期四";
if(xQ==5) day = "星期五";
if(xQ==6) day = "<font color=#FF0000>星期六</font>";
document.write("今天"+tY+"年"+tM+"月"+tD+"日 本学期第", getXqWeek(2011,8,28), "周 "+day);