function showPopup(elementId){
		new Effect.SlideDown( document.getElementById(elementId));
	} 
	
	function hidePopup(elementId){
		new Effect.SlideUp( document.getElementById(elementId));
		document.getElementById(elementId).style.display = (document.getElementById(elementId).style.display == '') ? 'none' : '';
	}
	function changePreview(tabNumber, totalTabs){
		//alert(tabNumber);
		//alert("Display:"+document.getElementById('rtab' + tabNumber).style.display);
	    for (var i = 0; i < totalTabs; i++) {
	        document.getElementById('rtab' + i).style.display = 'none';
	    }
	    document.getElementById('rtab' + tabNumber).style.display = (document.getElementById('rtab' + tabNumber).style.display == '') ? 'none' : '';	    
	    //alert("Display:"+document.getElementById('rtab' + tabNumber).style.display)
	    divs = document.getElementById('tab-content-l').getElementsByTagName('li');
	    for (i = 0; i < divs.length; i++) {
	        if (divs[i].className == 'active') 
	        	divs[i].className = '';
	    }
	    document.getElementById('ltab' + tabNumber).className = 'active';
	}