var newWin = null;
function closeWin(){
	if (newWin != null){
		if(!newWin.closed)
			newWin.close();
	}
}

function popUp(strURL) {
	closeWin();

	var hoogte='';
	var breedte='';
	if (window.screen.height >= 760) {
		hoogte='600';
		breedte='500';
	} else {
		hoogte='400';
		breedte='500';
	}	

	var positie_top='';
	var positie_links='';
	positie_top=(screen.availHeight-hoogte)/2;
	positie_links=(screen.availWidth-breedte)/2;

	var strOptions="";
	strOptions="status=no,toolbar=yes,menubar=no,scrollbars=yes,resizable=no,location=no,top="+positie_top+",left="+positie_links+",height="+hoogte+",width="+breedte;
	newWin = window.open(strURL, 'newWin', strOptions);
	newWin.focus();
}

function popUp2(strURL) {
	closeWin();

	var hoogte='770';
	var breedte='1026';
	/*if (window.screen.height >= 760) {
		hoogte='600';
		breedte='500';
	} else {
		hoogte='400';
		breedte='500';
	}*/	

	var positie_top='';
	var positie_links='';
	positie_top=(screen.availHeight-hoogte)/2;
	positie_links=(screen.availWidth-breedte)/2;

	var strOptions="";
	strOptions="status=no,toolbar=yes,menubar=no,scrollbars=yes,resizable=no,location=no,top="+positie_top+",left="+positie_links+",height="+hoogte+",width="+breedte;
	newWin = window.open(strURL, 'newWin', strOptions);
	newWin.focus();
}


function sluitpopup() {
	if (newWin && !newWin.closed) {
		newWin.self.close();
	}
}