function enviar_ficha(pagina,id,tbl){
        var ancho= screen.availWidth;
        var alto= screen.availHeight;
        var pos_izq= (ancho-600)/2;
        var pos_arriba= (alto-600)/2;
        popwin=window.open(pagina+"?id="+id+"&tbl="+tbl,"ven","width=600,height=500,left="+pos_izq+",top="+pos_arriba);
        popwin.focus();
}
function print(tabla,id)
{
    var pagina="fichas/print_ficha_"+tabla+".php?id="+id;
    
    var ancho= screen.availWidth;
    var alto= screen.availHeight;
    var pos_izq= (ancho-800)/2;
    var pos_arriba= (alto-600)/2;
    var popwin=window.open(pagina,"printv","width=800, height=600,left="+pos_izq+",top="+pos_arriba+",scrollbars=yes");
    popwin.focus();
}
function abrirPolitica()
{
    var popwin=window.open("politica.html","poli_w","width=800,height=600,left=0,top=0,scrollbars=yes");
    popwin.focus();
    
}
function mas_info(id,tabla)
{
    var pagina="fichas/portada_ficha_"+tabla+".php?id="+id;
    var ancho= screen.availWidth;
    var alto= screen.availHeight;
    var pos_izq= (ancho-800)/2;
    var pos_arriba= (alto-600)/2;
    var popwin=window.open(pagina,"masinfo","width=800, height=600,left="+pos_izq+",top="+pos_arriba+",scrollbars=yes");
    popwin.focus();
}