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// dx/includes/dxutil1.js
// DX Library - basic edit utility to trim field and verify not empty

//----------
// DX_trim (STRING s)
// Removes all leading & trailing spaces from string s.
function DX_trim (s) {   
 var i=-1;var j=s.length-1;
 while (s.charAt(j)==" " && j>i)
  --j;
 if (j!=(s.length-1))
  s=s.slice(0,j+1);
 i=s.length-1;j=0;
 while (s.charAt(j)==" " && j<i)
  ++j;
 if (j!=0)
  s=s.slice(j,s.length);
 return s;
}

//----------
// DX_required - GENERAL checks that required field is completed
// pass form field and field name for error message
function DX_required(field,fieldname) {
 field.value=DX_trim(field.value);
 if (field.value.length == 0) {
  field.focus();
  alert("Please enter a value for the \""+fieldname+"\" field.");
  return false;
 }
 return true;
}


// -->