Banners = new Array();

function loadBanner(id) {
			$("#bannerframe"+id).attr("style","visibility: display");
			$("#bannerframe"+id).attr("src",URI + '?BANNER_ID=' + id);
			$("#bannerframe"+id).load( function() {
           	this.height = this.contentWindow.document.body.scrollHeight + 20  + 'px';
			this.width = this.contentWindow.document.body.scrollWidth;
			});
}	

function checkBannerPosition() {
	var i = 0;
	for(i=0; i < Banners.length;i++)
	if(Banners[i] != null)
	{
	  var position = $("#bannerframe"+Banners[i]).position();
	  var scrollPosition = $(window).height() + $(window).scrollTop();
	  
	  if(position.top + 50 <= scrollPosition) {
		 loadBanner(Banners[i]);
		 Banners[i]=null;
	  }
	}
}