javascript AND or OR statements?

[acctman]

can someone explain why this is not working? I'm not getting any errors. i'm assuming its my AND and OR statements. I work it just like I would do in php. It works fine if i just have the regular If statement without the AND or OR

 

<script type="text/javascript">
function validate(form) {
  var city = document.getElementById('city').value;
  var ethnicity = document.getElementById('ethnicity').value;
  var zip = document.getElementById('zip').value;
  var country = document.getElementById('country').value; 
  var state_3 = document.getElementById('state_3').value;
  var state_2 = document.getElementById('state_2').value;  
  if(city == "") {
    inlineMsg('city','<strong>Error:</strong><br />Enter your city.',6);
    return false;
  }
  if(ethnicity == "") {
    inlineMsg('ethnicity','<strong>Error:</strong><br />Select your ethnicity.',6);
    return false;
  }

  if(country == "US" || "CA" && zip == "") {
    inlineMsg('zip','<strong>Error:</strong><br />Input your zipcode US/CAN.',6);
    return false;
  }  

  if(country == "") {
    inlineMsg('country','<strong>Error:</strong><br />Select your country.',6);
    return false;
  }

  if(country == "US" && state_3 == "") {
    inlineMsg('state_3','<strong>Error:</strong><br />Select your state.',6);
    return false;
  }  
  if(country == "CA" && state_2 == "") {
    inlineMsg('state_2','<strong>Error:</strong><br />Select your province.',6);
    return false;
  }

  return true;
}
</script>

[Ken2k7]

  if(country == "US" || "CA" && zip == "") {
    inlineMsg('zip','<strong>Error:</strong><br />Input your zipcode US/CAN.',6);
    return false;
  }  

That works if you convert that into PHP? o.O

 

Try this:

  if((country == "US" || country == "CA") && zip == "") {
    inlineMsg('zip','<strong>Error:</strong><br />Input your zipcode US/CAN.',6);
    return false;
  }