//validate form
function validateForm()
{
	trimFields();
	if(obj.first_name.value == "")
	{
		alert("Please enter your First Name.");
		obj.first_name.focus();
		return false;
	}
	if(obj.last_name.value == "")
	{
		alert("Please enter your Last Name.");
		obj.last_name.focus();
		return false;
	}
	if(obj.email.value == "")
	{
		alert("Please enter your Email Address.");
		obj.email.focus();
		return false;
	}
	if(!chkEmail(obj.email.value))
	{
		alert("Please enter a Valid Email Address.");
		obj.email.select();
		obj.email.focus();
		return false;
	}
	if(obj.comment.value == "")
	{
		alert("Please enter your Comment");
		obj.comment.focus();
		return false;
	}
	if(obj.captcha.value == "")
	{
		alert("Please enter the number on the given image.");
		obj.captcha.focus();
		return false;
	}
	//If validated
	return true;
}