Contare i caratteri al NETTO degli SPAZI in una textarea

[pela]

prova ora:

function textCounter(field,cntfield,maxlimit) { 
  var str=field.value.replace(/ /g,"");
  if (str.length > maxlimit) // if too long...trim it! 
    field.value = field.value.substring(0, maxlimit+field.value.length-str.length); 
  // otherwise, update 'characters left' counter 
  else 
    cntfield.value = maxlimit - str.length; 
}