function abrir_pop2(URL ,largura, altura) { 

var width = largura;
var height = altura; 

var left = 1; 
var top = 1; 

window.open(URL,'janela', 'width='+width+', height='+height+', top='+top+', left='+left+', scrollbars=yes, status=no, toolbar=no, location=no, directories=no, menubar=no, resizable=no, fullscreen=no'); 

}