isNS4 = (document.layers) ? true : false;
isIE4 = (document.all && !document.getElementById) ? true : false;
isIE5 = (document.all && document.getElementById) ? true : false;
isNS6 = (!document.all && document.getElementById) ? true : false;

function switchDiv(strDivName,bolVisible){
 //identify the element based on browser type
 if (isNS4) {
   objElement = document.layers[strDivName];
 } else if (isIE4) {
   objElement = document.all[strDivName];
 } else if (isIE5 || isNS6) {
   objElement = document.getElementById(strDivName);
 }
 
 if(isNS4){
     if(!bolVisible) {
       objElement.display ="none";
     } else {
       objElement.display ="block";
     }     
 }else{
     if(!bolVisible) {
       objElement.style.display = "none";
     } else {
       objElement.style.display = "block";
     }
 }
}

function changeTab (tabGroup, tabNumber)
{
	var de = document.getElementsByTagName("div");
	var dt = document.getElementsByTagName("td");
	//var myObject = document.getElementById(tabGroup + "_tab" + tabNumber);
	//var itemOn = new RegExp ("_on", "gi");
	//var itemOff = new RegExp ("_off", "gi");
	
	for (i=0; i<dt.length; i++)
	{
		if (dt[i].id && dt[i].id.indexOf(tabGroup + "_tab") == 0)
			dt[i].style.backgroundColor = "#EEEEEE";
		if (dt[i].id && dt[i].id.indexOf(tabGroup + "_textTab") == 0)
			dt[i].style.fontWeight = "normal";
	}
	
	for (i=0; i<de.length; i++)
	{
		if (de[i].id && de[i].id.indexOf(tabGroup + "_content") == 0)
			switchDiv(de[i].id, false);
	}
	
	elementID = tabGroup + "_tab" + tabNumber;
	if (document.getElementById(elementID))
		document.getElementById(elementID).style.backgroundColor = "#D5D5D5";
	else
	{
		elementID = tabGroup + "_textTab" + tabNumber;
		document.getElementById(elementID).style.fontWeight = "bold";
	}
	switchDiv(tabGroup + "_content" + tabNumber, true);
}

function messagePipe ()
{
	var message = "";
	if (message)
		alert(message);
}

function room_num()
   {
   var w = document.packageinfo.rooms.selectedIndex;
   var roomnum = document.packageinfo.rooms.options[w].text;
   changeTab('mode',(roomnum));
   }