function nada(){
	var nada, nada="";
      alert("Para CONTINUAR debe seleccionar una de las opcciones disponibles.");
}

function nodisponible(){
      alert("Debe seleccionar otra de las opciones disponibles.");
}




function oW( windowURL, windowName, windowFeatures ) {
    return window.open( windowURL, windowName, windowFeatures ) ;
}

function openWin( windowURL, windowName, windowFeatures ) {
    return window.open( windowURL, windowName, windowFeatures ) ;
}

function cerrar()
{
window.opener=self;
window.close();

}


function DaFecha()
{
  var d, s = "";
  d = new Date();
  s += d.getDate() + "/";
  s += (d.getMonth() + 1) + "/";
  s += d.getYear();
  return(s);
}


function volver(){

	history.go(-1);


}





function check_date(field){
var checkstr = "0123456789";
var DateField = field;
var Datevalue = "";
var DateTemp = "";
var seperator = "/";
var day;
var month;
var year;
var leap = 0;
var err = 0;
var i;
   err = 0;
   DateValue = DateField.value;
   /* Delete all chars except 0..9 */
   for (i = 0; i < DateValue.length; i++) {
	  if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) {
	     DateTemp = DateTemp + DateValue.substr(i,1);
	  }
   }
   DateValue = DateTemp;
   /* Always change date to 8 digits - string*/
   /* if year is entered as 2-digit / always assume 20xx */
   if (DateValue.length == 6) {
      DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); }
   if (DateValue.length != 8) {
      err = 19;}
   /* year is wrong if year = 0000 */
   year = DateValue.substr(4,4);
   if (year == 0) {
      err = 20;
   }
   /* Validation of month*/
   month = DateValue.substr(2,2);
   if ((month < 1) || (month > 12)) {
      err = 21;
   }
   /* Validation of day*/
   day = DateValue.substr(0,2);
   if (day < 1) {
     err = 22;
   }
   /* Validation leap-year / february / day */
   if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) {
      leap = 1;
   }
   if ((month == 2) && (leap == 1) && (day > 29)) {
      err = 23;
   }
   if ((month == 2) && (leap != 1) && (day > 28)) {
      err = 24;
   }
   /* Validation of other months */
   if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) {
      err = 25;
   }
   if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) {
      err = 26;
   }
   /* if 00 ist entered, no error, deleting the entry */
   if ((day == 0) && (month == 0) && (year == 00)) {
      err = 0; day = ""; month = ""; year = ""; seperator = "";
   }
   /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */
   if (err == 0) {
      DateField.value = day + seperator + month + seperator + year;
   }
   /* Error-message if err != 0 */
   else {
      alert("Fecha incorrecta!");
      DateField.select();
	  DateField.focus();
   }
}


function expandingWindow(website) {
var heightspeed = 20; // vertical scrolling speed (higher = slower)
var widthspeed = 15;  // horizontal scrolling speed (higher = slower)
var leftdist = 0;    // distance to left edge of window
var topdist = 0;     // distance to top edge of window
if (document.all) {
var winwidth = window.screen.availWidth - leftdist;
var winheight = window.screen.availHeight - topdist;
var sizer = window.open("","","left=" + leftdist + ",top=" + topdist + ",width=1,height=1,scrollbars=yes,toolbar=1,resizable");
for (sizeheight = 1; sizeheight < winheight; sizeheight += heightspeed) {
sizer.resizeTo("1", sizeheight);
}
for (sizewidth = 1; sizewidth < winwidth; sizewidth += widthspeed) {
sizer.resizeTo(sizewidth, sizeheight);
}
sizer.location = website;
}
else
window.location = website;
}

function Imprimir_Pagina() {
window.print();
}