function nextPage() {
		var curPage=document.getElementById('mainDiv').src;
		var curNum=curPage.charAt(curPage.length-5);
		curNum++;
		if(curNum>numberOfPages) {
			curNum=numberOfPages;
		}
		var newPage=currentPath+"/page"+curNum+".php";
		updateButtonStatus(curNum);		
		document.getElementById('mainDiv').src=newPage;
	  }
	  
	 function prevPage() {
		var curPage=document.getElementById('mainDiv').src;
		var curNum=curPage.charAt(curPage.length-5);
		curNum--;
		if(curNum<1) {
			curNum=1;
		}
		updateButtonStatus(curNum);
		var newPage=currentPath+"/page"+curNum+".php";
		document.getElementById('mainDiv').src=newPage;
	  }
	  
	  function updateButtonStatus(curPage) {
	  	document.getElementById("prevButton").disabled=(curPage==1);
		document.getElementById("nextButton").disabled=(curPage==numberOfPages);
	  }
	  
	  function goToc() {
		var newPage=currentPath+"/page2.php";
		document.getElementById('mainDiv').src=newPage;
	}