function openNewWin(url){
 margen  = 50; /*borde que deja*/
 ancho = screen.availWidth  - margen;
 alto  = screen.availHeight - margen;
 info  = window.open(url , "_blank" , "width=300,height=400,scrollbars=YES,resizable=YES,location=YES,menubar=YES");
 info.moveTo(margen,margen);
 info.resizeTo(ancho-margen,alto-margen);
 //return info;
 
}