var DHTML = false, DOM = false, MSIE4 = false, NS4 = false, OP = false;
if (document.getElementById) {
  DHTML = true;
  DOM = true;
} else {
  if (document.all) {
    DHTML = true;
    MSIE4 = true;
  } else {
    if (document.layers) {
      DHTML = true;
      NS4 = true;
    }
  }
}
if (window.opera) {
  OP = true;
}
function getElement (Mode, Identifier, ElementNumber) {
  var Element, ElementList;
  if (DOM) {
    if (Mode.toLowerCase() == "id") {
      Element = document.getElementById(Identifier);
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "name") {
      ElementList = document.getElementsByName(Identifier);
      Element = ElementList[ElementNumber];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "tagname") {
      ElementList = document.getElementsByTagName(Identifier);
      Element = ElementList[ElementNumber];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    return false;
  }
  if (MSIE4) {
    if (Mode.toLowerCase() == "id" || Mode.toLowerCase() == "name") {
      Element = document.all(Identifier);
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "tagname") {
      ElementList = document.all.tags(Identifier);
      Element = ElementList[ElementNumber];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    return false;
  }
  if (NS4) {
    if (Mode.toLowerCase() == "id" || Mode.toLowerCase() == "name") {
      Element = document[Identifier];
      if (!Element) {
        Element = document.anchors[Identifier];
      }
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    if (Mode.toLowerCase() == "layerindex") {
      Element = document.layers[Identifier];
      if (!Element) {
        Element = false;
      }
      return Element;
    }
    return false;
  }
  return false;
}
function getAttribute (Mode, Identifier, ElementNumber, AttributeName) {
  var Attribute;
  var Element = getElement(Mode, Identifier, ElementNumber);
  if (!Element) {
    return false;
  }
  if (DOM || MSIE4) {
    Attribute = Element.getAttribute(AttributeName);
    return Attribute;
  }
  if (NS4) {
    Attribute = Element[AttributeName]
    if (!Attribute) {
       Attribute = false;
    }
    return Attribute;
  }
  return false;
}
function getContent (Mode, Identifier, ElementNumber) {
  var Content;
  var Element = getElement(Mode, Identifier, ElementNumber);
  if (!Element) {
    return false;
  }
  if (DOM && Element.firstChild) {
    if (Element.firstChild.nodeType == 3) {
      Content = Element.firstChild.nodeValue;
    } else {
      Content = "";
    }
    return Content;
  }
  if (MSIE4) {
    Content = Element.innerText;
    return Content;
  }
  return false;
}
function setContent (Mode, Identifier, ElementNumber, Text) {
  var Element = getElement(Mode, Identifier, ElementNumber);
  if (!Element) {
    return false;
  }
  if (DOM && Element.firstChild) {
    Element.firstChild.nodeValue = Text;
    return true;
  }
  if (MSIE4) {
    Element.innerText = Text;
    return true;
  }
  if (NS4) {
    Element.document.open();
    Element.document.write(Text);
    Element.document.close();
    return true;
  }
  return true;
}
function checkSendMessage(mandMsg, seqNo, seqMsg) {
  // check mandatory fields
  if (document.messageForm.fromEmail.value == ""  || document.messageForm.fromPhone.value == "" ||
      document.messageForm.fromMessage.value == "" || document.messageForm.senderCode.value == "") {
    alert(mandMsg);
    return false;
  }
  if (document.messageForm.senderCode.value != seqNo) { 
    alert(seqMsg); 
    return false; 
  }
  document.messageForm.submit();
}
// hide overlay div
function hideForm(divName){
    document.getElementById(divName).style.visibility = "hidden";
}
// send alarm overlay form
function sendAlarmForm2(message){
  if (document.noticeForm.alarmReason.value == "" || document.noticeForm.senderCode.value == "") {
    alert(message);
    return false;
  }
  document.noticeForm.submit();
}
// send share email overlay form
function sendEmailForm(message){
  if (document.emailForm.sendEmail.value == "" || 
      document.emailForm.msg1.value == "" || 
      document.emailForm.senderCode.value == "") {
    alert(message);
    return false;
  }
  document.emailForm.submit();
}
// generic method to show an overlay div
function showForm(divName) {
   var viewportwidth;
   var viewportheight;
   // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
   if (typeof window.innerWidth != 'undefined') {
        viewportwidth = window.innerWidth,
        viewportheight = window.innerHeight
   }
   // IE6 in standards compliant mode (i.e. with a valid doctype as the first line in the document)
   else if (typeof document.documentElement != 'undefined'
       && typeof document.documentElement.clientWidth !=
       'undefined' && document.documentElement.clientWidth != 0) {
         viewportwidth = document.documentElement.clientWidth,
         viewportheight = document.documentElement.clientHeight
   }
   // older versions of IE
   else {
         viewportwidth = document.getElementsByTagName('body')[0].clientWidth,
         viewportheight = document.getElementsByTagName('body')[0].clientHeight
   }
   var divStyle = document.getElementById(divName).style;
   divStyle.visibility = "visible";
   divStyle.height = viewportheight + "px";
   divStyle.width = viewportwidth + "px";
}
var timeout	= 500;
var closetimer	= 0;
var ddmenuitem	= 0;
// open hidden layer
function mopen(id){	
	// cancel close timer
	mcancelclosetime();
	// close old layer
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	// get new layer and show it
	ddmenuitem = document.getElementById(id);
	ddmenuitem.style.visibility = 'visible';
}
// close showed layer
function mclose(){
	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
}
// go close timer
function mclosetime() {
	closetimer = window.setTimeout(mclose, timeout);
}
// cancel close timer
function mcancelclosetime(){
	if(closetimer){
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}
// close layer when click-out
document.onclick = mclose;