// JavaScript Document

// http://www.chipchapin.com/WebTools/JavaScript/example1-05.html 

  function Require(obForm,szFields)
    {
      var fields = szFields.split(",")
      var szMissing= new Array();
      for (x=0;x<fields.length;x++) {
        if (obForm.elements[fields[x]].value.length==0) {
           szMissing[szMissing.length]=new String(fields[x]);
        }
      }
      if (szMissing.length) {
        alert("The field"+((szMissing.length>1)?"s ":" ")+szMissing.join(",")+" must be filled in first");
        return false
      }
      return true;
    }