ちょっとしたJavaScriptライブラリ作ってみた

//copyright:@Meaue 2011.4.28

function executeTimeLink(){
  var timeLinkList = getTimeLinkList();
  for(var i=0; i<timeLinkList.length; i++){
    //timetag is not necessarily class...
    var timetag = timeLinkList(i).id;
    if( timetag != null){
      var content=timetag.split("timelink");
      //supposing... id="timelink_start:2002.12.31_end:2004.12.12"
      if(content[0]=="" && content[1]!=null){
        var limits = content[1].split("_");
        for(var m=0; m<limits.length; m++){
          if(limits[m].match(/./)){
            var methodAndTime = limits[m].split(":");
            var now = new Date();
            //Further extension is possible.
            alert(methodAndTime[0]);
            if(methodAndTime[0]=="start" && isValidTimeLink(methodAndTime[1])){
              //dissapear if date is before start
              if(now-toDate(methodAndTime[1])< 0){
                dissapear(timeLinkList(i));
              }
            }
            if(methodAndTime[0]=="end" && isValidTimeLink(methodAndTime[1])){
              //disappear if date is after end
              if(now-toDate(methodAndTime[1])>0){
                disappear(timeLinkList(i));
              }
            }
          }
        }
      }
    }
  }
}

function getTimeLinkList(){
  var elemList = document.getElementsByTagName("div");
  return elemList;
}

function disappear(timeLink){
  //make the tag empty
  document.getElementById(timeLink.id).innerHTML = "";
}

function toDate(time){
  var contents = time.split(".");
  return new Date(contents[0], contents[1]+1, contents[2]);
}

function isValidTimeLink(str){
  //leap year should be concerned...
  if(str.match(/./)){
    var contents = str.split(".");
    if(contents.length == 3){
      return true;
    }
  }
  return false;
}

window.onload=executeTimeLink;