function goster(elem)
{
	document.getElementById(elem).style.display = 'block';
}

function gizle(elem)
{
	document.getElementById(elem).style.display = 'none';
}

function ortala(eleM)
{
	eW = document.getElementById(eleM).offsetWidth;
	eH = document.getElementById(eleM).offsetHeight;
	newX = (window.innerWidth - eW) / 2;
	newY = (window.innerHeight - eH) / 2;
	
//	window.alert('eW:'+eW+'\neH:'+eH+'\nnewX:'+newX+'\nnewY:'+newY);
	
	document.getElementById(eleM).style.top  = newY+'px';
	document.getElementById(eleM).style.left = newX+'px';
}