// JavaScript Document

var numBanners = 7;
var preloadDone = false;

function handlePreload(thePage) {
	// create object
	
    imageObj = new Image();
	
	switch(thePage) {
	case 0: // home	
	  for(i=1; i<= numBanners; i++) 
      {
          imageObj.src= "images/top_banner_"+i+".jpg";
      }
	  break;    
	case 1:  // inside level 1
	  for(i=1; i<= numBanners; i++) 
      {
         imageObj.src= "../images/top_banner_"+i+".jpg";
      }
	  break;
	case 2: // inside level 2
	  for(i=1; i<= numBanners; i++) 
      {
         imageObj.src= "../../images/top_banner_"+i+".jpg";
      }
	  break;
	}

	preloadDone = true;

}

function loadBanner(thePage) {
	
	if(!preloadDone)
		handlePreload(thePage);
	
	var now = new Date();
	index = (now.getDate() % numBanners)+1;
	
	switch(thePage) {
	case 0: // home	
		document.images.banner.src = "images/top_banner_"+index+".jpg";
		break;
	case 1:  // inside level 1
		document.images.banner.src = "../images/top_banner_"+index+".jpg";
		break;
	case 2: // inside level 2
		document.images.banner.src = "../../images/top_banner_"+index+".jpg";
		break;
	}
	
}