function checkEmail(s, required)
{
	var i = 1;
	var sLength = s.length;
	//if it's not required and it's blank, then it's ok
	if(!required && sLength == 0)
		return true;
	else
	{
		//look for @
		while((i < sLength) && (s.charAt(i) != "@"))
			i++;
		if((i >= sLength) || (s.charAt(i) != "@"))
			return false;
		else
			i += 2;
		//look for .
		while((i < sLength) && (s.charAt(i) != "."))
			i++
		//there must be at least one character after the .
		if((i >= sLength - 1) || (s.charAt(i) != "."))
			return false;
		else
			return true;
	}
}
function validate(form)
{
	if(form.name.value.length == 0)
		{
			alert("Please enter your Name.");
			form.name.focus();
			return false;
		}
	if(form.phone.value.length == 0)
		{
			alert("Please enter a Contact Number.");
			form.phone.focus();
			return false;
		}
	if(!checkEmail(form.email.value, true))
		{
			alert("Please enter a valid Email Address.");
			form.email.focus();
			return false;
		}
	return true;
}