document.write('<span id="clock">&nbsp;</span>')
  // client time when loaded
  var ldc = new Date();
  // server time when loaded
  var lds = new Date(i10("2012"), i10("02")-1, i10("23"), i10("02"), i10("17"), i10("15"));
  // start clock
  var clk = document.getElementById("clock");
  var d=new initArray(
   " 星期日",
   " 星期一",
   " 星期二",
   " 星期三",
   " 星期四",
   " 星期五",
   " 星期六");
 var strdate=" "+lds.getYear()+"年"+(lds.getMonth()+1)+"月"+lds.getDate()+"日"+d[lds.getDay()+1]+"  ";
  tick();
 function tick() {
      if (clk && clk.innerHTML) {
      // current client time
      var cc = new Date();
      // current server time
      var cs = new Date(cc.getTime() - ldc.getTime() + lds.getTime());
      // set time
      clk.innerHTML =strdate+ to2c(cs.getHours()) + ':' + to2c(cs.getMinutes()) + ':' + to2c(cs.getSeconds());
      // set next tick
      setTimeout(tick, 1000);
      }
  }
   function to2c(n) {
      return (n <10 ? '0' + n : '' + n);
   }
   function i10(s) {
      return parseInt(s, 10);
   }
   function initArray(){
     this.length = initArray.arguments.length
     for(var i=0;i<this.length;i++)
     this[i+1]=initArray.arguments[i]  }