// This code makes provision for the 'Next' and 'Previous' functionalities

var curPage
curPage = 1;
pages = 4;
//Change to number of divs to display

function goToPage(pageNum) {
	intPageNum = parseInt(pageNum)
	if((intPageNum > pages) || (intPageNum < 0))  return;
	//Assigning the div tags to hide and show
	hideName = "BlackHolder" + curPage
	showName = "BlackHolder" + pageNum
	//Hiding and showing the div elements
	HideShow(hideName, showName)
	curPage = pageNum
}

function goToPrevPage() {
	//if we're at the first page, go back
	intCurPage = parseInt(curPage)
	if(intCurPage==1) return;
	//name of current page to hide
	hideName = "BlackHolder"+curPage;
	//setting the name for the previous page
	intNewPage = intCurPage-1;

	curPage = String(intNewPage)
	showName = "BlackHolder"+curPage;
	//hide and show
	HideShow(hideName, showName)
}

function goToNextPage() {
	//if we're at the last page, go back
	intCurPage = parseInt(curPage)
	if(intCurPage+1>pages) return;
	
	hideName = "BlackHolder"+curPage;
	intNewPage = intCurPage+1;
	
	curPage = String(intNewPage)
	showName = "BlackHolder"+curPage;
	
	HideShow(hideName, showName)
}

function HideShow(hideName, showName){
	if (!document.getElementById(showName)) return;
	//now hide the first, and show the second...
	
	divToHide = document.getElementById(hideName)
	divToShow = document.getElementById(showName)

	divToHide.style.display="none"
	divToShow.style.display="block"
}