ページのリアルタイム更新時間のJSインスタンスコード

 
  
function startTime() { 
  
                     var today = new Date(); //         
  
                     var yyyy = today.getFullYear(); //       getFullYear()         
  
                     var MM = today.getMonth() + 1; //       getMonth()         
  
                     var dd = today.getDate(); //       getDate()          
  
                     var hh = today.getHours(); //       getHours         
  
                     var mm = today.getMinutes(); //       getMinutes         
  
                     var ss = today.getSeconds(); //       getSeconds        
  
                     //            10，      0，         3 20 9   ，   15：20：09   
  
                     MM = checkTime(MM); 
  
                     dd = checkTime(dd); 
  
                     mm = checkTime(mm); 
  
                     ss = checkTime(ss); 
  
                     var day; //      （getDay()        ） 
  
                     if (today.getDay() == 0) day = "    " 
  
                     if (today.getDay() == 1) day = "    " 
  
                     if (today.getDay() == 2) day = "    " 
  
                     if (today.getDay() == 3) day = "    " 
  
                     if (today.getDay() == 4) day = "    " 
  
                     if (today.getDay() == 5) day = "    " 
  
                     if (today.getDay() == 6) day = "    " 
  
                     document.getElementById('nowDateTimeSpan').innerHTML = yyyy + "-" + MM + "-" + dd + " " + hh + ":" + mm + ":" + ss + "   " + day; 
  
                     setTimeout('startTime()', 1000); //        startTime()   
  
                 } 
   
  
                 function checkTime(i) {
                     if (i < 10) {
                         i = "0" + i;
                     }
                     return i;
                 }