function checkZipCode(area) {


	     if (document.getElementById('zipCode').value.length == 0) {
          alert ('Please enter your zip code');
          document.getElementById('zipCode').focus();
          return false;
       }
      if (document.getElementById('zipCode').value.length < 5) {
          alert ('Please enter the first 5 digits of your zip code');
          document.getElementById('zipCode').focus();
           return false;
       }
       if (isNaN(document.getElementById('zipCode').value)) {
           alert ('Zip code must be numbers only');
          document.getElementById('zipCode').focus();
           return false;
       }
 
     if (area == "main") {
          var w = window.open('http://moneytrack.org/getlistings.php?zipCode=' + document.getElementById('zipCode').value,'Popup_Window','toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=yes, resizable=yes, copyhistory=yes, width=650, height=600');
 	return false;    
     }
     else return true;
      
 
 }