function hideImgBox(imgBox, afterFinishEval) {
	new Effect.Opacity(imgBox, {
				duration: 0.2,
	      transition: Effect.Transitions.linear, 
	      from: 1.0, to: 0.0,
	      afterFinish: function() {
	      	imgBox.style.display = 'none';
	      	if ( afterFinishEval ) {
	      		eval(afterFinishEval);
	      	}
	    	}
	});
	new Effect.Opacity(mask, {
				duration: 0.2,
	      transition: Effect.Transitions.linear, 
	      from: 0.4, to: 0.0,
	      afterFinish: function() {
	      	mask.style.display = 'none';
	    	}
	});
}
var leftOffset;
function showImage() {
	leftOffset = Math.round(getPageSize()[0]/2-img.width/2);
	imgBox.style.left = leftOffset+"px";
	imgBoxImg.src = imgSrc;
	Element.setOpacity(imgBox, 0.0);
	Element.setOpacity(mask, 0.0);
	imgBox.style.display = 'block';
	mask.style.height = getPageSize()[1]+"px";
	mask.style.display = 'block';
	new Effect.Opacity(imgBox, {
		duration: 0.2,
  	transition: Effect.Transitions.linear, 
  	from: 0.0, to: 1.0
  });
  new Effect.Opacity(mask, {
		duration: 0.2,
  	transition: Effect.Transitions.linear, 
  	from: 0.0, to: 0.4
  });
}
var oldSrc;
var time = new Date();
var imgSrc;
var img = new Image;
function popImg(imgSrcParam) {
	imgSrc = imgSrcParam;
	if ( imgSrcParam == oldSrc && imgBox.style.display == 'block' ) {
		hideImgBox(imgBox);
	} else {
		img.src = imgSrc;
		oldSrc = imgSrcParam;
		img.onload = function() {
			if ( imgBox.style.display == 'block' ) {
				hideImgBox(imgBox, 'showImage()');
			} else {
				showImage();
	    }
	    imgBox.style.top = Math.round((document.body.clientHeight-img.height+getPageScroll()[1])/2)+"px";
		}
	}
}










function ukaz_skry(div_id) {
	var a=document.getElementById(div_id);
	
	if (a.style.display=="none") a.style.display="block"
	else a.style.display="none";
}

function countit(areaId, maxLength, ostava)
{
	maxL= maxLength;
	str=areaId.value;
	strlength= str.length;
	if (strlength > maxL )
	{
		areaId.value=str.substring(0,maxL);
		alert('Maximálny počet znakov je '+maxL+'!');
		charleft = '0';
	} else charleft = maxL - strlength;
	document.getElementById(ostava).value=charleft;
	return false;
};

function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

function isEmail(str)
{
	var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
	return regex.test(str);
}
function na_open_window(name, url, left, top, width, height, toolbar, menubar, statusbar, scrollbar, resizable)
{
  toolbar_str = toolbar ? 'yes' : 'no';
  menubar_str = menubar ? 'yes' : 'no';
  statusbar_str = statusbar ? 'yes' : 'no';
  scrollbar_str = scrollbar ? 'yes' : 'no';
  resizable_str = resizable ? 'yes' : 'no';
  window.open(url, name, 'left='+left+',top='+top+',width='+width+',height='+height+',toolbar='+toolbar_str+',menubar='+menubar_str+',status='+statusbar_str+',scrollbars='+scrollbar_str+',resizable='+resizable_str);
}