function checkForm() {
	FirstName = document.getElementById("FirstName").value;
	Email = document.getElementById("Email").value;
	Comments = document.getElementById("Comments").value;
	 
	if (FirstName == "") {
		hideAllErrors();
		document.getElementById("FirstNameError").style.display = "inline";
		document.getElementById("FirstName").select();
		document.getElementById("FirstName").focus();
		return false;
	} else if (Email  == "") {
		hideAllErrors();
		document.getElementById("EmailError").style.display = "inline";
		document.getElementById("Email").select();
		document.getElementById("Email").focus();
		return false;
	} else if (Comments  == "") {
		hideAllErrors();
		document.getElementById("CommentsError").style.display = "inline";
		document.getElementById("Comments").select();
		document.getElementById("Comments").focus();
		return false;
	}
	return true;
}

function hideAllErrors() {
	document.getElementById("FirstNameError").style.display = "none"
	document.getElementById("EmailError").style.display = "none"
	document.getElementById("CommentsError").style.display = "none"
}

hideAllErrors();