function showDate()
{
var d = new Date();  
document.write("<div class=\"date_div\">"+d.getFullYear()+"年"+(d.getMonth()+1)+"月"+d.getDate()+"日");
switch(d.getDay())
{
 case 0:
  document.write("&nbsp;星期日");
  break;
 case 1:
  document.write("&nbsp;星期一");
  break;
 case 2:
  document.write("&nbsp;星期二");
  break;
 case 3:
  document.write("&nbsp;星期三");
  break;
 case 4:
  document.write("&nbsp;星期四");
  break;
 case 5:
  document.write("&nbsp;星期五");
  break;
 case 6:
  document.write("&nbsp;星期六");
  break;
}
 document.write("</div>");
}