function abreLink(pagina,janela,largura,altura){//sem status bar
	
	var feat = "resizable=no , scrollbars=no";
	var h= altura;
	var w = largura;
	var posx ;
	var posy ;	
		
	posx = (screen.width-w)/2;
	posy = (screen.height-h)/2;
	
    var desktopname2 = window.open( pagina,janela,'width='+w+',height='+h+','+feat+',top='+posy+',left='+posx);
}