var newWin = null;

function closeWin(){
	if (newWin != null){
	if(!newWin.closed)
	newWin.close();
	}
}
function popup(strURL,strType,strHeight,strWidth) {
closeWin();
var strOptions="";
var largeur_ecran=screen.width/2;
var hauteur_ecran=screen.height/2;
var top_position=hauteur_ecran-(strHeight/2);
var left_position=largeur_ecran-(strWidth/2);

	if (strType=="console") strOptions="scrollbars,height="+strHeight+",width="+strWidth+",top="+top_position+",left="+left_position;
	if (strType=="fixed") strOptions="status,height="+strHeight+",width="+strWidth;
	if (strType=="elastic") strOptions="toolbar,menubar,scrollbars,resizable,location,height="+strHeight+",width="+strWidth;
newWin = window.open(strURL, 'newWin', strOptions);
newWin.resizeTo(strWidth, strHeight);
newWin.focus();
}