function validateContactForm(form){
	var alertMsg = "Please enter data for the following missing fields:\n\n"
	//alert(form.rbContactType[2].checked);
	if(contactUs.frmFirstName.value==""){
		alertMsg = alertMsg + "  First Name: \n"
	}
	if(contactUs.frmLastName.value==""){
		alertMsg = alertMsg + "  Last Name: \n"
	}
	if(contactUs.frmCity.value==""){
		alertMsg = alertMsg + "  City: \n"
	}
	
	if (form.rbContactType[1].checked){
	
		var Phone=form.frmPhone
		
		if ((Phone.value==null)||(Phone.value=="")){
			alert("Please Enter your Phone Number")
			Phone.focus()
			return false
		}
		if (checkInternationalPhone(Phone.value)==false){
			alert("Please Enter a Valid Phone Number")
			Phone.value=""
			Phone.focus()
			return false
		}
	}
	if(contactUs.frmComments.value==""){
		alertMsg = alertMsg + "  Message: \n"
	}
	//validate email address
	var emailID=contactUs.frmEmailAddress
	
	if ((emailID.value==null)||(emailID.value=="")){
		alert("Please Enter your Email Address")
		emailID.focus()
		return false
	}
	if (echeck(emailID.value)==false){
		emailID.value=""
		emailID.focus()
		return false
	}
	
	if (alertMsg == "Please enter data for the following missing fields:\n\n"){
		return true;
	} 	
	else {
		alert(alertMsg);
		return false;
	}
}

function resetForm(){
	document.contactUs.reset();
}

//validate email address.

function echeck(str) {

	var at="@"
	var dot="."
	var lat=str.indexOf(at)
	var lstr=str.length
	var ldot=str.indexOf(dot)
	if (str.indexOf(at)==-1){
		alert("Invalid E-mail Address")
		return false
	}

	if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		alert("Invalid E-mail Address")
		return false
	}

	if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		alert("Invalid E-mail Address")
		return false
	}

		if (str.indexOf(at,(lat+1))!=-1){
		alert("Invalid E-mail Address")
		return false
		}

		if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		alert("Invalid E-mail Address")
		return false
		}

		if (str.indexOf(dot,(lat+2))==-1){
		alert("Invalid E-mail Address")
		return false
		}
	
		if (str.indexOf(" ")!=-1){
		alert("Invalid E-mail Address")
		return false
		}

 		return true					
}

// Declaring required variables
	var digits = "0123456789";
	// non-digit characters which are allowed in phone numbers
	var phoneNumberDelimiters = "()- ";
	// characters which are allowed in international phone numbers
	// (a leading + is OK)
	var validWorldPhoneChars = phoneNumberDelimiters + "+";
	// Minimum no of digits in an international phone no.
	var minDigitsInIPhoneNumber = 10;
	
	function isInteger(s)
	{   var i;
	    for (i = 0; i < s.length; i++)
	    {   
		// Check that current character is number.
		var c = s.charAt(i);
		if (((c < "0") || (c > "9"))) return false;
	    }
	    // All characters are numbers.
	    return true;
	}
	
	function stripCharsInBag(s, bag)
	{   var i;
	    var returnString = "";
	    // Search through string's characters one by one.
	    // If character is not in bag, append to returnString.
	    for (i = 0; i < s.length; i++)
	    {   
		// Check that current character isn't whitespace.
		var c = s.charAt(i);
		if (bag.indexOf(c) == -1) returnString += c;
	    }
	    return returnString;
	}
	
	function checkInternationalPhone(strPhone){
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
	}