// 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		
	}

	dayPhone = document.fbForm.txtworkphone
	if (isNaN(dayPhone.value))
	{
		alert("Phone number you have entered is invalid");
		dayPhone.focus()
		return false		
	}

	eveningPhone = document.fbForm.txthomephone
	if (isNaN(eveningPhone.value))
	{
		alert("Phone number you have entered is invalid");
		eveningPhone.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 != "" && !isNaN(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		
	}	
}

// BMI Calculator

function converttometers(ht)
{
    return (ht/100);
}
function calculatebmi(ht,wt)
{
return (wt/Math.pow(ht,2));
}
function btnCalcbmi()
{
var formval = false;

	if (document.frmbmi.txtweight.value == '') 
	{
		alert("Please enter your weight");
		document.frmbmi.txtweight.focus();
		return false;		
	}
	else if (document.frmbmi.txtheight.value == '') 
	{
		alert("Please enter your height");
		document.frmbmi.txtheight.focus();
		return false;	
	}
	else
	{
		formval = true;
	}

	
	if (formval)
	{
		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";
	}

}