// To open a popup window

function MM_openBrWindow(theURL,winName,features) {

  window.open(theURL,winName,features);

}



// Newsletter Subscription Form

function Newsletter() {

  	mailid = document.newsMail.email

	if (mailid.value == '')

	{

		alert("Please enter E-mail Id");

		mailid.focus()

		return false

	}

	else if (mailid.value.indexOf("@")==-1 || mailid.value.indexOf(".")==-1){

		alert("Invalid E-mail ID")

		mailid.focus()	   

		return false

	}

}



// Feedback form validation

function Feedback() {



	firstName = document.fbForm.txtFirstname

	if (firstName.value == "" || !isNaN(firstName.value))

	{

		alert("Please enter your first name");

		firstName.focus()

		return false		

	}



	lastName = document.fbForm.txtlastname

	if (lastName.value == "" || !isNaN(lastName.value))

	{

		alert("Please enter your last name");

		lastName.focus()

		return false		

	}



	


	mailid = document.fbForm.txtemail

	if (mailid.value == '')

	{

		alert("Please enter E-mail Id");

		mailid.focus()

		return false

	}

	else if (mailid.value.indexOf("@")==-1 || mailid.value.indexOf(".")==-1){

		alert("Invalid E-mail ID")

		mailid.focus()	   

		return false

	}



	age = document.fbForm.cmbAgeRange

	if (age.options[age.selectedIndex].value == "")

	{

		alert("Please select your age group");

		age.focus()

		return false		

	}	



	sportsAct = document.fbForm.txtsports

	if (sportsAct.value == "")

	{

		alert("Please enter Sports Activities");

		sportsAct.focus()

		return false		

	}



	comments = document.fbForm.txtComments

	if (comments.value == "" || !isNaN(comments.value))

	{

		alert("Please add your comments");

		comments.focus()

		return false		

	}	

}



// Appointments form validation

function Appointment()

{

if (document.frmAppointment.txtFirstName.value=="" || !isNaN(document.frmAppointment.txtFirstName.value))

	{

	alert('Enter FirstName');

	document.frmAppointment.txtFirstName.focus();

	return false;

	}

if (document.frmAppointment.txtSurname.value=="" || !isNaN(document.frmAppointment.txtSurname.value))

	{

	alert('Enter Surname');

	document.frmAppointment.txtSurname.focus();

	return false;

	}

if (document.frmAppointment.txtHomePhoneNumber.value=="" || isNaN(document.frmAppointment.txtHomePhoneNumber.value))

	{

	alert('Enter Home Phone No.');

	document.frmAppointment.txtHomePhoneNumber.focus();

	return false;

	}

if (document.frmAppointment.txtBusinessPhoneNumber.value!="" && isNaN(document.frmAppointment.txtBusinessPhoneNumber.value))

	{

	alert('Enter a valid Business Phone Number');

	document.frmAppointment.txtBusinessPhoneNumber.focus();

	return false;

	}

	

if (document.frmAppointment.txtMobileNumber.value!="" && isNaN(document.frmAppointment.txtMobileNumber.value))

	{

	alert('Mobile number you have entered is invalid');

	document.frmAppointment.txtMobileNumber.focus();

	return false;

	}

	

if (document.frmAppointment.txtEmailAddress.value=="")

	{

	alert('Enter Email Address');

	document.frmAppointment.txtEmailAddress.focus();

	return false;

	}

	else if (document.frmAppointment.txtEmailAddress.value.indexOf("@")==-1 || document.frmAppointment.txtEmailAddress.value.indexOf(".")==-1){

		alert("Invalid E-mail ID")

		document.frmAppointment.txtEmailAddress.focus()	   

		return false

	}	

}



// BMI Calculator

function converttometers(ht)

{

    return (ht/100);

}

function calculatebmi(ht,wt)

{

return (wt/Math.pow(ht,2));

}

function btnCalcbmi()

{

if (document.frmbmi.txtheight.value != '')

{

	var ht=converttometers(document.frmbmi.txtheight.value);

	var wt=document.frmbmi.txtweight.value;

	var bmi=Math.round(calculatebmi(ht,wt));

	document.frmbmi.txtbmi.value=parseInt(bmi);

	

	if (parseInt(bmi) <19) 

document.frmbmi.comment.value = "Underweight";

if (parseInt(bmi) >=19 && parseInt(bmi) <=25) 

document.frmbmi.comment.value = "Desirable";

if (parseInt(bmi) >=26 && parseInt(bmi) <=29) 

document.frmbmi.comment.value = "Prone to health risks";

if (parseInt(bmi) >=30 && parseInt(bmi) <=40) 

document.frmbmi.comment.value = "Obese";

if (parseInt(bmi) >40) 

document.frmbmi.comment.value = "Extremely obese";

	

}

else 

{

	alert("Please enter your weight and height");

	return false;

}

}