function validate_required(field,alerttxt)
{
with (field)
{
  if (value==null||value=="")
  {alert(alerttxt);return false;}
  else {return true;}
}
}

function validate_email(field,alerttxt)
{
with (field)
{
apos=value.indexOf("@");
dotpos=value.lastIndexOf(".");
if (apos<1||dotpos-apos<2) 
  {alert(alerttxt);return false;}
else {return true;}
}
}

function validate_form(thisform)
{
with (thisform)
{
if (validate_required(race,"Please select your Race!")==false)
  {race.focus();return false;}
if (validate_required(fname,"Please enter your First Name!")==false)
  {fname.focus();return false;}
if (validate_required(lname,"Please enter your Last Name!")==false)
  {lname.focus();return false;}
if (validate_email(email,"Please enter a valid Email Address!")==false)
  {email.focus();return false;}
if (validate_required(phone,"Please enter your Phone Number!")==false)
  {phone.focus();return false;}
if (validate_required(address,"Please enter your Street Address!")==false)
  {address.focus();return false;}
if (validate_required(city,"Please enter your City!")==false)
  {city.focus();return false;}
if (validate_required(state,"Please enter your State!")==false)
  {state.focus();return false;}
if (validate_required(zip,"Please enter your Zip Code!")==false)
  {zip.focus();return false;}
if (validate_required(age,"Please enter your Age!")==false)
  {age.focus();return false;}
if (validate_required(sex,"Please enter your Sex!")==false)
  {sex.focus();return false;}
if (validate_required(shirt,"Please enter your Shirt Size!")==false)
  {shirt.focus();return false;}
if (validate_required(refer,"Please tell us how you heard about this event!")==false)
  {refer.focus();return false;}
if (validate_required(security_code,"Please enter the 5 digit security code!")==false)
  {security_code.focus();return false;}
}
}