function openWindow(pgn, parametros, ancho, alto, scrollbars, resizable) {
	derecha=(screen.width-ancho)/2;
	arriba=(screen.height-alto)/2;
	
	if(resizable==true)
		resizable = 1;
	else
		resizable = 0;
		
	if(scrollbars==true)
		scrollbars = 1;
	else
		scrollbars = 0;
	
	string="toolbar=0,scrollbars="+scrollbars+",location=0,statusbar=0,menubar=0,resizable="+resizable+",width="+ancho+",height="+alto+",left="+derecha+",top="+arriba+"";
		
	fin=window.open(pgn+'?'+parametros,"ventana", string);
}

function dimensionar(ancho, alto) {
	window.resizeTo(ancho,alto);
	derecha=(screen.width-ancho)/2;
	arriba=(screen.height-alto)/2;
	window.moveTo(derecha, arriba)
}

function darFoco() {
	self.focus();
}

function doPost(frm, params) {
	var frm = document.getElementById(frm);
	if(frm) {
		frm.action = params;
		frm.submit();
	}
}