function viewParagraph(ptable, link){
		var obj = document.getElementById(ptable);
		obj.className = obj.className == 'none' ? 'visible' : 'none';
		link.className = link.className == 'cur' ? '' : 'cur';
	}
	
	function closePreview(){
		preview_bg.className = 'none';
	}
	
	function openPreview(img, w, h){
		preview_bg.className = 'visible';
		preview_bg.style.height = document.getElementById('siteBlock').offsetHeight;
		image_preview.src = img;
		image_preview.width = w;
		image_preview.height = h;
		
		preview_block.style.left = (document.body.offsetWidth/2) - (preview_block.offsetWidth/2);
		toppos =  (document.body.offsetHeight/2) + document.body.scrollTop - (preview_block.offsetHeight/2);
		
		if(toppos < 0)
			preview_block.style.top = 0;
		else
			preview_block.style.top = toppos;
		document.onkeydown = escapePreview;
	}
	
	function fixPng(){
		if (/MSIE (5\.5|6).+Win/.test(navigator.userAgent) && navigator.userAgent.search("Opera") < 0){
			preview_bg.id = 'imagePreviewBgFix';
			preview_bg = document.getElementById('imagePreviewBgFix');
		}
	}
	
	function escapePreview (event)
		{
			if (window.event) event = window.event;
			var code = event.keyCode ? event.keyCode : event.which ? event.which : null;
			if (code == 27)
			{
				preview_bg.className = 'none';
		
				document.onclick = null;
				document.onkeydown = null;
			}
		}