/*___________________________________________________________________________________________________________________

	mediaCT webinterieur - www.mediact.nl - info@mediact.nl - 050 5799393 - Groningen - The Netherlands
	copyright: http://creativecommons.org/licenses/by-nc-nd/2.0/deed.nl

_____________________________________________________________________________________________________________________*/

	var timer;
	var foldersHeight 	= 0;
	var changedHeight 	= 0;
	var foldersSpace	= 12;
	var folderImages 	= new Array();
	
	function loadedPage() {
		calculateScroll();
		startScroll();
	}
	
	function calculateScroll() {
		imgObj 	= 'obj';
		i 		= 1;
		while(imgObj != null) {
			imgObj = document.getElementById('folderImg' + i);
			if(imgObj) folderImages.push(imgObj.height)
			i++;
		}
		
		for(i=0; i < folderImages.length; i++) {
			foldersHeight += folderImages[i];
			foldersHeight += foldersSpace;
		}
	}
	
	function startScroll() {
		if(document.getElementById('folders')){
			foldersObj = document.getElementById('folders');
			foldersBackupObj = document.getElementById('folders_backup');
	
			foldersObj.style.top = '-' + changedHeight + 'px';
			foldersBackupObj.style.top = '-' + changedHeight + 'px';
			changedHeight += 2;
			if(changedHeight >= foldersHeight) changedHeight = 0;
			
			timer = setTimeout('startScroll()',50);
		}
	}
	
	function stopScroll() {
		clearTimeout(timer);
	}