function abreForm( vfnURL, vfnLargura, vfnAltura ){
	
	var vT;
	var vL;
	var vNome;
	var vVetor;
	
	vT = ( window.screen.height / 2 ) - ( vfnAltura / 2 );
	vT = ( vT-40);
	vL = ( window.screen.width / 2 ) - ( vfnLargura / 2 );
		
	window.open( vfnURL, '_blank', 'resizable=no, scrollbars=no, width=' + vfnLargura + 'px, height=' + vfnAltura + 'px, left=' + vL + 'px, top=' + vT + 'px' );
	
}