//this highlights the topnav link, which is set in the body tag
var currentpage = "none";
	
	function setPage(pagename){
		if (document.images[currentpage]){
			document.images[currentpage].src = eval(currentpage).src;
		}
			if (pagename != 'none' && document.images[pagename]){
				document.images[pagename].src = eval(pagename+"on").src;
			}
			currentpage = pagename;
		}
		
//this preloads all the images
if (document.images) {
		//home page nav
		nav_work_on= new Image;
     	nav_work_on.src="images/nav_work_on.gif";  
     	nav_work= new Image;
     	nav_work.src="images/nav_work.gif";
		
		nav_people_on= new Image;
     	nav_people_on.src="images/nav_people_on.gif";  
     	nav_people= new Image;
     	nav_people.src="images/nav_people.gif";
		
		nav_safety_on= new Image;
     	nav_safety_on.src="images/nav_safety_on.gif";  
     	nav_safety= new Image;
     	nav_safety.src="images/nav_safety.gif";
		
		nav_contact_on= new Image;
     	nav_contact_on.src="images/nav_contact_on.gif";  
     	nav_contact= new Image;
     	nav_contact.src="images/nav_contact.gif";	
		
		//interior page nav
		rtnav_work_roll= new Image;
     	rtnav_work_roll.src="images/rtnav_work_roll.gif";  
     	rtnav_work= new Image;
     	rtnav_work.src="images/rtnav_work.gif";
		
		rtnav_people_roll= new Image;
     	rtnav_people_roll.src="images/rtnav_people_roll.gif";  
     	rtnav_people= new Image;
     	rtnav_people.src="images/rtnav_people.gif";
		
		rtnav_safety_roll= new Image;
     	rtnav_safety_roll.src="images/rtnav_safety_roll.gif";  
     	rtnav_safety= new Image;
     	rtnav_safety.src="images/rtnav_safety.gif";
		
		rtnav_contact_roll= new Image;
     	rtnav_contact_roll.src="images/rtnav_contact_roll.gif";  
     	rtnav_contact= new Image;
     	rtnav_contact.src="images/rtnav_contact.gif";	
  }
  
 //rollover function for single images
 function rollImage(imagename,imageloc){
		if (currentpage != imageloc){
			document.images[imageloc].src = imagename.src;
		}
	}

//popup window
function openAWindow( pageToLoad, winName, width, height, center) {  
	xposition=100; yposition=100;

    if ((parseInt(navigator.appVersion) >= 4 ) && (winName=="undefined")){
    xposition=screen.width-100; yposition=screen.height-100;
    }
    args = "width=" + width + "," 
    + "height=" + height + "," 
    + "location=0," 
    + "menubar=0,"
    + "resizable=0,"
    + "scrollbars=1,"
    + "status=0," 
    + "titlebar=0,"
    + "toolbar=0,"
    + "hotkeys=0,"
    + "screenx=" + xposition + ","  //NN Only
    + "screeny=" + yposition + ","  //NN Only
    + "left=" + xposition + ","     //IE Only
    + "top=" + yposition;           //IE Only

    window.open( pageToLoad,winName,args );
	}
	
//popup window
function openAWindowJob( pageToLoad, winName, width, height, center) {  
	xposition=100; yposition=100;

    if ((parseInt(navigator.appVersion) >= 4 ) && (winName=="undefined")){
    xposition=screen.width-100; yposition=screen.height-100;
    }
    args = "width=" + width + "," 
    + "height=" + height + "," 
    + "location=0," 
    + "menubar=0,"
    + "resizable=0,"
    + "scrollbars=2,"
    + "status=0," 
    + "titlebar=0,"
    + "toolbar=0,"
    + "hotkeys=0,"
    + "screenx=" + xposition + ","  //NN Only
    + "screeny=" + yposition + ","  //NN Only
    + "left=" + xposition + ","     //IE Only
    + "top=" + yposition;           //IE Only

    window.open( pageToLoad,winName,args );
	}