function show(id)
{
	var button = document.getElementById(id);
	button.style.display = "block";	
}

function hide(id)
{
	var button = document.getElementById(id);
	button.style.display = "none";
}

function CheckComment()
{
	if( document.getElementById('username').value == '' || document.getElementById('comment').value == '' )
	{
		window.scrollTo(0,0);
		show('popup');
		
		return false;
		
	}else{
		
		return true;
	}
}

function CheckUserdata()
{
	if( document.getElementById('username').value == '' || document.getElementById('password_1').value == '' || document.getElementById('password_2').value == '' || document.getElementById('email').value == '' )
	{
		window.scrollTo(0,0);
		show('popup');
		
		return false;
		
	}else{
		
		return true;
	}
}

function rate(id, type)
{
 	if(type == 1)
 	{
	 	document.getElementById('rate_' + id).src = activestar;
	 	document.getElementById("rateval").innerHTML = ratetext[id];
	 	document.getElementById("ratevalue").value = id;
 	
 	}else{
 
 		document.getElementById('rate_' + id).src = normalstar;
 	 	document.getElementById("rateval").innerHTML = ' ';
 	}	
}

function popup(pdata, psize) 
{
	var daten = psize.split("=");
	var width = daten[1].split(",");
	var fenster_b = width[0];
	var fenster_h = daten[2];
	var sh = screen.height;
	var sb = screen.width;
	var offX = (sb-fenster_b)/2;
	var offY = (sh-fenster_h)/2;
	var popupwin;	

	popupwin = window.open(pdata, '', psize+",left="+offX+",top="+offY,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resize=no');

	if (window.focus) 
	{
		popupwin.focus();
    }
}

function popup_win(url, popup_size)
{
	window.open(url, '', popup_size, 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no');
	
	if (window.focus) 
	{
		popupwin.focus();
    }
}