if (document.images) 
{ 
nav1on = new Image();
nav1on.src = "images/nav_units_on.gif";
nav2on = new Image();
nav2on.src = "images/nav_specs_on.gif";
nav3on = new Image();
nav3on.src = "images/nav_about_on.gif";
nav4on = new Image();
nav4on.src = "images/nav_cypress_on.gif";
nav5on = new Image();
nav5on.src = "images/nav_dev_on.gif";
nav6on = new Image();
nav6on.src = "images/nav_contact_on.gif";
navProgon = new Image();
navProgon.src = "images/nav_prog_on.gif";
navPhotoon = new Image();
navPhotoon.src = "images/nav_photos_on.gif";


nav1off = new Image();
nav1off.src = "images/nav_units_off.gif";
nav2off = new Image();
nav2off.src = "images/nav_specs_off.gif";
nav3off = new Image();
nav3off.src = "images/nav_about_off.gif";
nav4off = new Image();
nav4off.src = "images/nav_cypress_off.gif";
nav5off = new Image();
nav5off.src = "images/nav_dev_off.gif";
nav6off = new Image();
nav6off.src = "images/nav_contact_off.gif";
navProgoff = new Image();
navProgoff.src = "images/nav_prog_off.gif";
navPhotooff = new Image();
navPhotooff.src = "images/nav_photos_off.gif";


fl1off = new Image();
fl1off.src = "images/fl1.gif";

} 

function imgOn(imgName) 
{ 
if (document.images) 
{ 
document[imgName].src = eval(imgName + "on.src"); 
} 
} 

function imgOff(imgName) 
{ 
if (document.images)
{ document[imgName].src = eval(imgName + "off.src"); 
} 
}

function imgUnit(imgName, UnitNo)
{
if (document.images)
{ document[imgName].src = "images/" + UnitNo + ".gif";
}
}

//pop-up function. All values can be passed. 
	function winPop(path,name,width,height,scrollbar) {
		window.open(''+path+'',''+name+'','target=new,toolbar=0,location=no,directories=0,status=0,menubar=0,scrollbars='+scrollbar+',resizable=1,width='+width+',height='+height+',top=50,left=200');
	}