function formateDate(date){
var result="";
var year=date.getFullYear();
var month=parseInt(date.getMonth()+1);
var day=date.getDate();
var hour=date.getHours();
var minus=date.getMinutes();
var second=0;
return year+"-"+twoLength(month)+"-"+twoLength(day)+" "+twoLength(hour)+":"+twoLength(minus)+":"+twoLength(second);
}
function formateDateForFileName(date){
var result="";
var year=date.getFullYear();
var month=parseInt(date.getMonth()+1);
var day=date.getDate();
var hour=date.getHours();
var minus=date.getMinutes();
var second=0;
return year+""+twoLength(month)+""+twoLength(day)+""+twoLength(hour)+""+twoLength(minus);
}
function twoLength(value){
  if(value<10){
    value="0"+value;
  }
  return value;
}
function makeDateList(){
  var selectValue='<select name="dateTime" id="dateTime" onchange="showImage()">';  
  var date=new Date();
  var minus=date.getMinutes();
  minus=parseInt(minus/30)*30;
  date.setMinutes(minus);  
  for(var i=0;i<=96;i++){
     date.setMinutes(date.getMinutes()-30);    
     selectValue+='<option value="'+formateDateForFileName(date)+"|"+formateDate(date)+'">'+formateDate(date)+'</option>';     
  }
  selectValue+="</select>"

  document.getElementById("dateTime").outerHTML=selectValue;
}
function showImage(){  
  var values=document.getElementById("dateTime").value.split("|");
  var time=values[1];
  var fileName=values[0]+".jpg";
  var picType=document.getElementById("picType").value;

  coreCode(fileName,picType,time);

}
function coreCode(fileName,picType,time){
  document.getElementById("wxyt").src="../../wxyt/"+picType+"/"+fileName;
  document.getElementById("showtime").innerHTML=time;
  var name="红外云图";
  if(picType=="hw"){
    name="红外云图";
  }else if(picType=="sw"){
    name="三维云图";
  }else if(picType=="kjg"){
    name="可见光图";
  }else if(picType=="sq"){
    name="水汽云图";
  }
  $("path").innerHTML=name;
  document.getElementById("showName").innerHTML=name;
}
function changeTimeList(){
  var timeLength=$("dateTime").options.length;  
  var i=0;
  for(i=0;i<cs-1;i++){
    if(document.getElementById("dateTime").options[i].selected){
      $("dateTime").options[i+1].selected=true; 
      showImage();
      break;      
    }
  }  
  if(i==cs-1){
    killFlash();
  }
}
var sh;
var cs;
function showFlash(type){
  killFlash(); 
  $("dateTime").options[0].selected=true; 
  cs=type*2;
  sh=setInterval(changeTimeList,500); 
        
  
}
function killFlash(){
  clearTimeout(sh);
}
function changePicType(picType){
  document.getElementById("picType").value=picType;
  
}
function showStaticImage(){
  killFlash(); 
  $("dateTime").options[0].selected=true; 
  showImage();
}
function showHistroy(value){
  var timeLength=$("dateTime").options.length; 
 
  for(i=0;i<timeLength;i++){
    if(document.getElementById("dateTime").options[i].selected){
      if(i==0&&value==-1){
        return;
      }
      if(i==timeLength-1&&value==1){
        return;
      }
      $("dateTime").options[i+value].selected=true; 
      showImage();
      break;      
    }
  }  
}