function validateForm(workshop_id)
{
	trimFields();
	if(obj.first_name.value == "")
	{
		alert("Please enter your First Name.");
		obj.first_name.focus();
		return;
	}
	if(obj.last_name.value == "")
	{
		alert("Please enter your Last Name.");
		obj.last_name.focus();
		return;
	}
	if(obj.email.value == "")
	{
		alert("Please enter your Email Address.");
		obj.email.focus();
		return;
	}
	if(!chkEmail(obj.email.value))
	{
		alert("The Email Address appears to be invalid!\nPlease review and correct it.");
		obj.email.focus();
		obj.email.select();
		return;
	}
	//all fine?
	obj.action = "workshop_details.php?wid="+workshop_id;
	obj.submit();
}