function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function validate() {
  if (contactus.from_email.value.length==0 && contactus.phone.value.length==0) {
    alert('請務必輸入閣下的電郵地址或電話聯絡方式。');
    contactus.from_email.focus();
    return false;
  } else {
    return true;
  }
}

iScrollMsg=0;
function scrollMsg() {
  frontPart = myMsg.substring(iScrollMsg,myMsg.length)
  backPart = myMsg.substring(0,iScrollMsg)
  window.status = frontPart + backPart
  if (iScrollMsg < myMsg.length) {
    iScrollMsg++
  } else {
    iScrollMsg = 0
  }
}

iScrollTitle=0;
function scrollTitle() {
  frontPart = myTitle.substring(iScrollTitle,myTitle.length)
  backPart = myTitle.substring(0,iScrollTitle);
  document.title = frontPart + backPart;
  if (iScrollTitle < myTitle.length) {
    iScrollTitle++;
  } else {
    iScrollTitle = 0
  }
}

function initScroll() {
  if (myTitle == null) {
    window.setInterval("scrollMsg()",300);
  } else if (myMsg == null) {
    window.setInterval("scrollTitle()",300);
  } else {
    window.setInterval("scrollTitle();scrollMsg();", 300);
  }
}

function addToFavorites(url, desc) {
  if (window.external) {
    external.AddFavorite(url, desc);
  }
}

function popWin(number) {
  HBFeature = "resizable=no,scrollBars=no,menuBar=no,directories=no,toolBar=no,location=No,status=No,width=547,height=349,screenX=80,screenY=80,top=80,left=80";

  if (number.length<1) {
    alert("Please enter vechicle registration number!");
    return false;
  }

  winHBF = window.open('../preview/hb.jsp?vrn='+number, "HorizontalBoard", HBFeature);
  winHBF.focus();
}


function getkey(e) {
  if (window.event) return window.event.keyCode;
  else if (e) return e.which;
  else return null;
}

function goodchars(e, goods) {
  var key, keychar;
  key = getkey(e);
  if (key == null) return true;
  // get character
  keychar = String.fromCharCode(key);
  keychar = keychar.toLowerCase();
  goods = goods.toLowerCase();
  // check goodkeys
  if (goods.indexOf(keychar) != -1) return true;
  // control keys
  if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 || key==16) return true;
  // else return false
  return false;
}

function getDateString(y_obj,m_obj,d_obj) {
  var y = y_obj.options[y_obj.selectedIndex].value;
  var m = m_obj.options[m_obj.selectedIndex].value;
  var d = d_obj.options[d_obj.selectedIndex].value;
  if (y=="" || m=="") { return null; }
  if (d=="") { d=1; }
  return str= y+'-'+m+'-'+d;
}