var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
}
else browser = "An unknown browser";

if (!version) version = detect.charAt(place + thestring.length);

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


function initNav() {
	MM_preloadImages('/images/nav/main/spVLine.gif','/images/nav/main/1_roll.gif','/images/nav/main/2_roll.gif','/images/nav/main/3_roll.gif','/images/nav/main/4_roll.gif','/images/nav/main/5_roll.gif','/images/nav/main/6_roll.gif','/images/nav/main/7_roll.gif','/images/nav/main/8_roll.gif',
	'/images/nav/services/4A_roll.gif','/images/nav/services/4B_roll.gif','/images/nav/services/4C_roll.gif','/images/nav/services/4D_roll.gif', '/images/nav/services/4E_roll.gif',
	'/images/nav/prj/5A_roll.gif','/images/nav/prj/5B_roll.gif','/images/nav/prj/5C_roll.gif','/images/nav/prj/5D_roll.gif','/images/nav/prj/5E_roll.gif','/images/nav/prj/5F_roll.gif',
	'/images/nav/contact/7A_roll.gif','/images/nav/contact/7B_roll.gif',
	'/images/nav/rec/8A_roll.gif','/images/nav/rec/8B_roll.gif','/images/nav/rec/8C_roll.gif',
	'/images/ServicePhil/small_service.gif', 
	'/images/CompanyHistory/small_history.gif', 
	'/images/services/small_services.gif','/images/services/small_design.gif','/images/services/small_general.gif', '/images/services/small_man.gif', '/images/services/small_preconstruction.gif',
	'/images/projects/small_projects.gif','/images/projects/small_ent.gif','/images/projects/small_ind.gif', '/images/projects/small_mis.gif', '/images/projects/small_mix.gif', '/images/projects/small_ret.gif',
	'/images/safety/small_safety.gif', 
	'/images/contactUs/small_contact.gif','/images/contactUs/small_us.gif','/images/contactUs/small_can.gif',
	'/images/recognition/small_recognition.gif','/images/recognition/small_project.gif','/images/recognition/small_saftey.gif', '/images/recognition/small_pr.gif');		
}

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_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 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) { //v4.0
  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 rollOverNav(navImgId, navImgPath, subNavId) {
   	var x;
	var p='';
	resetNav();
	swapNavImage(navImgId, '', navImgPath);
	if(subNavId) {
	 swapSubNav(subNavId);
	 resetSubNav();
	 }

	if (navImgId=='Home')
		p='/images/home/small_home.gif';	
	else if (navImgId=='ServicePhilosophy')
		p='/images/ServicePhil/small_service.gif';
	else if (navImgId=='CompanyHistory')
		p='/images/CompanyHistory/small_history.gif';
	else if (navImgId=='Services')
		p='/images/services/small_services.gif';		
	else if (navImgId=='Projects')
		p='/images/projects/small_projects.gif';
	else if (navImgId=='Safety')
		p='/images/safety/small_safety.gif';
	else if (navImgId=='ContactUs')
		p='/images/contactUs/small_contact.gif';
	else if (navImgId=='Recognition')
		p='/images/recognition/small_recognition.gif';
												
	// Only swap small pic, if one to switch to.
	if (p=='') {swapSmallImgRestore();}else{swapSmallImage('imgSmall','',p);}
}

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

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

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

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


/* Shows the passed sub nav and stores in module variable.
   Is to be used with swapSubNavRestore().
*/
m_LastSubNav=null;
function swapSubNav(subNavId) { 
  var o;
  if ((o=MM_findObj(subNavId))!=null) {
	if(version>4){o.style.visibility="visible"}else{o.visibility = "visible"};
    m_LastSubNav=o; 
  }
}

/* Hides the last sub nav that was shown with swapSubNav().
*/
function swapSubNavRestore() { 
  if (m_LastSubNav!=null) {
  if(version>4){m_LastSubNav.style.visibility="hidden";}else{m_LastSubNav.visibility="hidden";}
	m_LastSubNav=null;}
}


/* Resets the navigation to the original state.
*/
function resetNav() {
	swapNavImgRestore();swapSubNavRestore();
}

function resetSubNav() {
	MM_swapImgRestore();
}


function openNavTo (navImgId, navImgPath, subNavId, subNavImgId, subNavImgPath) {
	
//	rollOverNav(navImgId, navImgPath, subNavId);
	swapSubNav(subNavId);
    var img=MM_findObj(navImgId);
	img.src=navImgPath;

	img=MM_findObj(subNavImgId);
	img.src=subNavImgPath;
}



function rollOverSubNav(subNavImgId, subNavImgPath) {
	resetSubNav();
	var p;
	
	if (subNavImgId == '4A')
		p='/images/services/small_general.gif';		
	else if (subNavImgId == '4B')
		p='/images/services/small_man.gif';		
	else if (subNavImgId == '4C')
		p='/images/services/small_design.gif';		
	else if (subNavImgId == '4D')
		p='/images/services/small_preconstruction.gif';		
	else if (subNavImgId == '4E')
		p='/images/ServicePhil/small_service.gif';		
	else if (subNavImgId == '5A')
		p='/images/projects/small_ent.gif';
	else if (subNavImgId == '5B')
		p='/images/projects/small_ret.gif';
	else if (subNavImgId == '5C')
		p='/images/projects/small_ind.gif';
	else if (subNavImgId == '5D')
		p='/images/projects/small_mix.gif';
	else if (subNavImgId == '5E')
		p='/images/projects/small_mis.gif';
	else if (subNavImgId == '5F')
		p='/images/projects/small_5F.gif';

	else if (subNavImgId == '7A')
		p='/images/contactUs/small_us.gif';				
	else if (subNavImgId == '7B')
		p='/images/contactUs/small_can.gif';						

	else if (subNavImgId == '8A')
		p='/images/recognition/small_project.gif';				
	else if (subNavImgId == '8B')
		p='/images/recognition/small_safety.gif';				
	else if (subNavImgId == '8C')
		p='/images/recognition/small_pr.gif';								
										
	MM_swapImage(subNavImgId,'',subNavImgPath);
	swapSmallImage('imgSmall','',p);

}


function loadQuote(arrQuote) {
    var count=arrQuote.length - 1;
	var ranNum= Math.round(Math.random()*count);
	var img=MM_findObj("imgQuote");
	img.src=arrQuote[ranNum];
}

initNav();