function openSwf(archivo, ancho, alto){

    var quality="high";

    document.write('<object>\n');

	document.write('<param name="wmode" value="transparent" />\n');

    document.write('<param name="allowScriptAccess" value="sameDomain" />\n');

    document.write('<param name="movie" value="'+archivo+'.swf" />\n');

    document.write('<param name="quality" value="'+quality+'" />\n');

    document.write('<embed wmode="transparent" src="images/'+archivo+'.swf" quality="'+quality+'" width="'+ancho+'" height="'+alto+'" name="'+archivo+'" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" />\n');

    document.write('</object>\n');

}



function showHide(id1,id2){

	id1.style.display = 'block';

	id2.style.display = 'none'; 

}



/* ================================ */

/* code para calcular el dia fertil */

/* ================================ */



function Calcular(snpsForm){

	var retorno;

	retorno = FechaMasDias(snpsForm)

	if(retorno==false){

		alert("Introduzca fecha valida");

		return false;

	}

}





function FechaMasDias(snpsForm){

	var dia = snpsForm.day.options[snpsForm.day.selectedIndex].value;

	var mes = snpsForm.month.options[snpsForm.month.selectedIndex].value;

	var anno = snpsForm.year.value;

	var x = snpsForm.x.options[snpsForm.x.selectedIndex].value;

	var maxdia;



	dia  = 	eval(dia);

	mes  = 	eval(mes);

	anno = 	eval(anno);

	x =	eval(x);



	if (mes == 2){

		if ((anno%4)==0){

			maxdia = 29;

		}else{

			maxdia = 28;

		}

	}



	if (mes==1||mes==3||mes==5||mes==7||mes==8||mes==10||mes==12)

		maxdia = 31;

	if (mes==4||mes==6||mes==9||mes==11)

		maxdia = 30;

	if (dia>maxdia) {

		return false;

	}

	

		var diamf = dia + x - 14;

		var intinf = dia + x - 17;

		var intsup = dia + x - 11;



		fecha1 = Calc(maxdia,mes,anno,diamf);

		fecha2 = Calc(maxdia,mes,anno,intinf);

		fecha3 = Calc(maxdia,mes,anno,intsup);



		document.snpsForm.fecha1.value=fecha1;

		document.snpsForm.fecha2.value=fecha2;	

		document.snpsForm.fecha3.value=fecha3;

}	





function Calc(maxdia,mes,anno,date){

	if (date > maxdia){

		date = date - maxdia;

		if (mes == 12){

			anno = anno + 1;

			mes = 1;

		}else{

			mes = mes + 1;

		}

	}



	if (date < 10) date = "0" + date;

	if (mes < 10) mes = "0"+ mes;

	fecha= date + "/" + mes + "/" + anno;

	return fecha;

}	



	







function CalcCycle(theForm) {



//Form verifying:



alert();



	var year1 = theForm.year1.options[theForm.year1.selectedIndex].value;



	var year2 = theForm.year2.options[theForm.year2.selectedIndex].value;







	/*if (year1  == "")  {



	           alert ("El año esta en blanco");



	        return;



	}







	if (year1 < 1000){



	           alert ("Intentelo de nuevo\n\nIntroduzca los cuatro digitos del año");



	        return;



	}



	if (year2 == "")  {



	           alert ("Intentalo de nuevo\n\nEl año no ha sido introducido!");



	        return;



	}



	if (("" + parseInt(year2)) != year2)  {

	           alert ("Intentalo de nuevo\n\nDebe escribir el año en numeros");



	        return;



	}



	if (year2 < 1000){



	           alert ("Intentalo de nuevo\n\nEscribe los 4 numeros del año");



	        return;



	}*/











//Grab, format and calculate







	if (!(ValidateCycleDate(theForm.month1.options[theForm.month1.selectedIndex].value,year1,theForm.date1.options[theForm.date1.selectedIndex].value))) {



		alert("La fecha para el primer periodo no es valida!");



		return;



	}







	if (!(ValidateCycleDate(theForm.month2.options[theForm.month2.selectedIndex].value,year2,theForm.date2.options[theForm.date2.selectedIndex].value))) {



		alert("La fecha para el segundo periodo no es valida!");



		return;



	}



	Period1 =  Date.UTC(year1, theForm.month1.options[theForm.month1.selectedIndex].value, theForm.date1.options[theForm.date1.selectedIndex].value);







	Period2 =  Date.UTC(year2, theForm.month2.options[theForm.month2.selectedIndex].value, theForm.date2.options[theForm.date2.selectedIndex].value);







	CycleMS = (Period1 - Period2);







	if (Period1 > Period2){



			DayFormattedCycle = CycleMS / 86400000







				if ( DayFormattedCycle < 21 || DayFormattedCycle > 35 ) {



		   	   	   alert ("El resultado es" + DayFormattedCycle + " dias. Esta fuera del rango de dias esperado (21-35).");



				}







			theForm.cycle.value = DayFormattedCycle



			}







			else {



			//updated to reflect correct dates



	      alert ("La primera fecha debe ser mas reciente que la segunda.");



	      return;



		}







	}



function ValidateCycleDate(month,year,day) {



	var lmonth,lyear,lday;



	lmonth = parseInt(" " + month);



	lyear = parseInt(" " + year);



	lday = parseInt(" " + day);



	ldays = DaysInMonth(lmonth,lyear)







	if (lday > ldays) {



		return false;



	} else {



		return true;



	}



}











function DaysInMonth(month,year) {



	var days;







	switch (month) {







		case 1:



			days=31;



			break;







		case 3:



			days=31;



			break;







		case 5:



			days=31;



			break;







		case 7:



			days=31;



			break;







		case 8:



			days=31;



			break;







		case 10:



			days=31;



			break;







		case 12:



			days=31;



			break;







		case 4:



			days=30;



			break;



		case 6:



			days=30;



			break;



		case 9:



			days=30;



			break;



		case 11:



			days=30;



			break;



		case 2:







			if (IsLeapYear(year)) {



				days=29;



			}else{



				days=28;



			}



	}















	return days;











}







function IsLeapYear(lyear)  {







	if ( (lyear%4 == 0 && lyear%100 != 0) || (lyear%400 == 0) ) {



		return true;



	} else {



		return false;



	}



}