function openPage(url,wndname,width,height,center,scrollbars,resize)
{ 
	var left = 25; 
	var top = 25; 
	
	if(center == true) 
	{ 
		left = (screen.width - width)/2; 
		top = (screen.height - height)/2; 
	} 
	
	scrollbars = ( (scrollbars == undefined) || (scrollbars == false) ) ? 0 : 1;
	resize = ( (resize == undefined) || (resize == false) ) ? 0 : 1;
	
	var winStats='toolbar=no,location=no,directories=no,menubar=0,'; 
	winStats+='scrollbars='+scrollbars+',resizable='+resize+',width='+width+',height='+height; 
	if (navigator.appName.indexOf("Microsoft")>=0) 
	{ 
		winStats+=',left='+left+',top='+top; 
	} 
	else 
	{ 
		winStats+=',screenX='+left+',screenY='+top; 
	} 
	
	var apopup=window.open(url,wndname,winStats);
	apopup.window.focus(apopup);
	return apopup;
}
function disableSelection(target)
{
	if (typeof target.onselectstart != 'undefined')
	{
		target.onselectstart = function(e)
		{
			return false
		};
	}
	else if (typeof target.style.MozUserSelect != 'undefined')
	{
		target.style.MozUserSelect = 'none';
	}
	else
	{
		target.onmousedown = function(e)
		{
			return false
		};
	}
	target.style.cursor = 'default';
}


function clearInput(target)
{
	if (target.value == 'felhasználónév' || target.value == 'jelszó') 
	{
		target.value = '';
	}
}