function chkFields()
{

if (document.mainform.u_firstname.value == "")
	{
		alert
		("Please enter your first name.");
		document.mainform.u_firstname.focus();
		return false;
	}
	
if (document.mainform.u_lastname.value == "")
	{
		alert
		("Please enter your last name.");
		document.mainform.u_lastname.focus();
		return false;
	}

if (document.mainform.u_phone.value == "")
	{
		alert
		("Please enter your phone number.");
		document.mainform.u_phone.focus();
		return false;
	}
	
	if (document.mainform.u_email.value == "" || document.mainform.u_email.value.indexOf("@") == -1 || document.mainform.u_email.value.indexOf(".") == -1 || document.mainform.u_email.value.indexOf(" ") != -1 || document.mainform.u_email.value.length < 6)
	
	{
		alert("Please enter a valid e-mail address.");
		document.mainform.u_email.focus();
		return false;
	}
	
if (document.mainform.u_knowmore.value == "")
	{
		alert
		("Please tell us what your inquiry is about.");
		document.mainform.u_knowmore.focus();
		return false;
	}
	
if (document.mainform.u_knowmore.length > 15000)
	{
		alert
		("Your inquiry text is too long, please shorten it.");
		document.mainform.u_knowmore.focus();
		return false;
	}
	
}