function CargarFoto(img, ancho, alto){
  derecha=(screen.width-ancho)/2;
  arriba=(screen.height-alto)/2;
  string="toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=1,width="+ancho+",height="+alto+",left="+derecha+",top="+arriba+"";
  fin=window.open(img,"",string);
}


function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=1,location=0,statusbar=0,menubar=0,resizable=0,width=430,height=250,left = 0,top = 0');");
}



function cerrarVentana(){ 
window.close() 
} 



function CharacterCount(field,remaining)
{
// This variable (MaxCharacters) sets the maximum characters allowed
var MaxCharacters = 50;
if (field.value.length > MaxCharacters)
{
field.value = field.value.substring(0, MaxCharacters);
}
else
{
// This will update remaining characters to be allowed
remaining.value = MaxCharacters - field.value.length;
}
}


function imprimir() {
  if (window.print)
    window.print()
  else
    alert("Disculpe, su navegador no soporta esta opción.");
}