function showDlgBox(fade_val){
	
	$('dlgBoxSfondo').setStyles({
		'width': document.documentElement.clientWidth,
		'height': document.documentElement.clientHeight}
		
	);
		
	
	if(fade_val > 0){
		$('dlgBoxSfondo').setStyle('display','inline');
		$('dlgBoxContainer').setStyle('display','inline');
		
	}
	else{
		$('dlgBoxContainer').set('text','');
		$('dlgBoxSfondo').setStyle('display','none');
		$('dlgBoxContainer').setStyle('display','none');
	}
		
	$('dlgBoxSfondo').fade(fade_val);
}

function showImage(src){
	showDlgBox(.8);
	
	var w = 640;
	var h = 480;
	
	var ml = (w/2).toInt();
	var mt = (h/2).toInt();
	
	$('dlgBoxContainer').setStyles({
		'width': w,
		'height': h,
		'margin-top' : '-' + mt + 'px',
		'margin-left' : '-' + ml + 'px' 
	});
	
	$('dlgBoxContainer').set('text','');
	
	(new Element('a',{
		'href' : 'javascript:showDlgBox(0)',
		'html' : '<img src="' + src + '">'
		})).inject($('dlgBoxContainer'));	
}