function showExtraInfo() {
	if (document.getElementById("practice").checked == true) {
		document.getElementById("petOwnerPracticeInfo").style.display = "none";
		document.getElementById("practiceInfo").style.display = "inline";
		if(getInternetExplorerVersion() == 8)
			document.getElementById("content").style.height = 642;
	} else if (document.getElementById("petOwner").checked == true) {
		document.getElementById("practiceInfo").style.display = "none";
		document.getElementById("petOwnerPracticeInfo").style.display = "inline";
		if(getInternetExplorerVersion() == 8)
			document.getElementById("content").style.height = 642;
	} else {
		document.getElementById("petOwnerPracticeInfo").style.display = "none";
		document.getElementById("practiceInfo").style.display = "none";
		if(getInternetExplorerVersion() == 8)
			document.getElementById("content").style.height = 500;
	}
}

function showHowDidYouHear() {
	if (document.getElementById("partnerPracticeNo").checked == true) {
		document.getElementById("howDidYouHearDiv").style.display = "inline";
		if(getInternetExplorerVersion() == 8)
			document.getElementById("content").style.height = 663;
	} else {
		document.getElementById("howDidYouHearDiv").style.display = "none";
		if(getInternetExplorerVersion() == 8)
			document.getElementById("content").style.height = 622;
	}
}

function validateContactUsForm() {
	var emailRegEx = /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i;

	if (document.getElementById("practice").checked == false && document.getElementById("petOwner").checked == false && document.getElementById("other").checked == false) {
		alert('Please select either Veterinary Professional, Pet Owner, or Other');
		return false;		
	}		
	
	if (document.getElementById("firstName").value.length == 0) {
		alert('Please enter your first name');
		document.getElementById("firstName").focus();
		return false;
	}  

	if (document.getElementById("lastName").value.length == 0) {
		alert('Please enter your last name');
		document.getElementById("lastName").focus();
		return false;
	}

	if (document.getElementById("practice").checked == true && document.getElementById("practiceName").value.length == 0) {
		alert('Please enter your practice\'s name');
		document.getElementById("practiceName").focus();
		return false;
	}  

	if (document.getElementById("practice").checked == true && document.getElementById("practiceTitle").value.length == 0) {
		alert('Please enter your title');
		document.getElementById("practiceTitle").focus();
		return false;
	}  

	if (document.getElementById("practice").checked == true && document.getElementById("partnerPracticeYes").checked == false && document.getElementById("partnerPracticeNo").checked == false) {
		alert('Please select your partner practice status');
		return false;
	}  

	if (document.getElementById("practice").checked == true && document.getElementById("partnerPracticeNo").checked == true && document.getElementById("howDidYouHear").selectedIndex == 0) {
		alert('Please select how you heard about VetCentric');
		document.getElementById("howDidYouHear").focus();
		return false;
	}

	if (document.getElementById("phone").value.length > 0) {
		document.getElementById("phone").value = parsePhoneNumber(document.getElementById("phone").value);
	}
	
	if (document.getElementById("phone").value.length > 0 && document.getElementById("phone").value.length != 12) {
		document.getElementById("phone").focus();
		return false;
	}

	if (document.getElementById("email").value.length == 0) {
		alert('Please enter your email address');
		document.getElementById("email").focus();
		return false;
	}

    if (document.getElementById("email").value.search(emailRegEx) == -1) {
        alert('Please enter a valid email address');
		document.getElementById("email").focus();
        return false;
    }

	if (document.getElementById("comment").value.length > 2000) {
		var alertMsg = 'Please limit your comment to 2000 characters or less.  You have entered ' + document.getElementById("comment").value.length + ' characters.';
		alert(alertMsg);
		document.getElementById("comment").focus();
		return false;
	}

	return true;
}

function getInternetExplorerVersion() {
	var rv = -1;
	if (navigator.appName == 'Microsoft Internet Explorer') {
		var ua = navigator.userAgent;
		var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
		if (re.exec(ua) != null)
			rv = parseFloat(RegExp.$1);
		}
	return rv;
}

function parsePhoneNumber(phoneString)
{
    var formattedString = "";
    var index = 0;
    var i;

    i = phoneString.length;
    while (index != i)
  	{
	   	if (isNaN(parseInt(phoneString.charAt(index)))) { 
	   	}
	    else { 
	    	formattedString = formattedString + phoneString.charAt(index);
	    }
	    index = index + 1;
	}
    if (formattedString.length == 10) {
		formattedString = formattedString.substring(0,3) + "-" + formattedString.substring(3,6) + "-" + formattedString.substring(6,10);
	}
    else {
	    formattedString = phoneString;
        alert("Please enter a valid phone number");
    }
    return formattedString;
}