function imgSwapOn(imgName,imgFile,imgType) {
	imgName.src='images/'+imgFile+'-on.'+imgType;
}

function imgSwapOff(imgName,imgFile,imgType) {
	imgName.src='images/'+imgFile+'.'+imgType;
}

function doPreload()  {
   var theImages = new Array(
	"images/pic_smallbuilding-on.jpg", 
	"images/nav_overview-on.gif", 
	"images/nav_floorplans-on.gif", 
	"images/nav_amenities-on.gif", 
	"images/nav_spaceplanning-on.gif", 
	"images/nav_contact-on.gif", 
	"images/nav_resourceful-on.gif", 
	"images/nav_savvy-on.gif", 
	"images/nav_opportunistic-on.gif", 
	"images/nav_visionary-on.gif", 
	"images/nav_smart-on.gif",
	"images/nav_resourceful2-on.gif", 
	"images/nav_savvy2-on.gif", 
	"images/nav_opportunistic2-on.gif", 
	"images/nav_visionary2-on.gif", 
	"images/nav_smart2-on.gif");
   preloadImages(theImages);
}

function preloadImages(theImages)  {
   for(var i = 0; i < theImages.length; i++)  {
      var theImage = new Image();
      theImage.src = theImages[i];
   }
}