function showmenu(id) {
  var lyr = getElemRefs(id);
  if (lyr && lyr.css) lyr.css.visibility = "visible";
}

function hidemenu(id) {
  var lyr = getElemRefs(id);
  if (lyr && lyr.css) lyr.css.visibility = "hidden";
}

function getElemRefs(id) {
	var el = (document.getElementById)? document.getElementById(id): (document.all)? document.all[id]: (document.layers)? document.layers[id]: null;
	if (el) el.css = (el.style)? el.style: el;
	return el;
}

function getDim2(el){
	for (var lx=0,ly=0;el!=null;
		ly+=el.offsetTop,lx+=el.offsetLeft,el=el.offsetParent);
	return {y:ly}
}
    function getDim(el){
	for (var lx=0,ly=0;el!=null;
		lx+=el.offsetLeft,ly+=el.offsetTop,el=el.offsetParent);
	return {x:lx}
}

	function changeState1()
		{
		document.getElementById("bpt-norm").style.display = 'none'; 
		document.getElementById("bpt-show").style.display = ''; 
		}
	
			
	function changeState2()
		{
		document.getElementById("bpt-home-norm").style.display = 'none'; 
		document.getElementById("bpt-home-show").style.display = ''; 
		}	
		
	function changeState3()
		{
		document.getElementById("bpt-cctv-norm").style.display = 'none'; 
		document.getElementById("bpt-cctv-show").style.display = ''; 
		}	
	function changeState4()
		{
		document.getElementById("bpt-nice-norm").style.display = 'none'; 
		document.getElementById("bpt-nice-show").style.display = ''; 
		}
		
	function changeState5()
		{
		document.getElementById("bpt-Technology-norm").style.display = 'none'; 
		document.getElementById("bpt-Technology-show").style.display = ''; 
		}				
		
//sub items start
function Linkop(obj) {
var el = document.getElementById(obj);
if ( el.style.display != 'none' ) {
el.style.display = 'none';
}
else {
el.style.display = '';
}
}

function changeState11()
		{
		document.getElementById("bpt-audio-show").style.display = ''; 
		}
//sub items end		
		
		
function changeState1OFF()
		{
		document.getElementById("bpt-norm").style.display = ''; 
		document.getElementById("bpt-show").style.display = 'none'; 
		}
function changeState2OFF()
		{
		document.getElementById("bpt-home-norm").style.display = ''; 
		document.getElementById("bpt-home-show").style.display = 'none'; 
		}	
		
function changeState3OFF()
		{
		document.getElementById("bpt-cctv-norm").style.display = ''; 
		document.getElementById("bpt-cctv-show").style.display = 'none'; 
		}	
function changeState4OFF()
		{
		document.getElementById("bpt-nice-norm").style.display = ''; 
		document.getElementById("bpt-nice-show").style.display = 'none'; 
		}	
function changeState5OFF()
		{
		document.getElementById("bpt-Technology-norm").style.display = ''; 
		document.getElementById("bpt-Technology-show").style.display = 'none'; 
		}			
		
		
		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_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_findObj(n, d) { //v4.0
  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 && document.getElementById) x=document.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];}
}