var spaces = " \t\r\n"+String.fromCharCode(160);



function isSpaceCharacter(ch) {

  return spaces.indexOf(ch) >-1;

}



function trim(str) {

   var s = new String(str);



   while (s.length>0 && isSpaceCharacter("" + s.charAt(s.length-1))) {

     s = s.substring(0,s.length-1);

   }



   while (s.length>0 && isSpaceCharacter(""+s.charAt(0))){

     s = s.substring(1);

   }



   return s

 }







function isEmpty(elem){

  return trim(elem.value).length==0;

}



function selectedRadio(sel){

  if(!sel || !sel.length){

     return null;

  }

  for(var i = 0; i<sel.length; i++){

     if(sel[i].checked){

        return sel[i].value;

     }

  }

  return null;

}



function isNumber(obj){

        return (obj.value.search("[^0-9 ]") == -1);

}



function isFloat(obj){

//    alert(obj.value.search("^[0-9]*\.[0-9]{"+prec+"}$") != -1);



    if ((obj.value.search("^[0-9]*\.[0-9]*$") != -1) || (obj.value.search("^[0-9]*$") != -1)) {

        return true;

    }

    else {

        return false;

    }

}



function isEmail(str) {

    if (str.search("[\\w\\._-]+@[\\w\\._-]+\\.[\\w\\._-]") == 0) {return true}

    else {return false};

}



function interrogate(what) {

//alert(what);

    var output = '';

    for (var i in what)

        output += i + ' = ' + what.i + " ; ";

    alert(output);

//    param.innerHTML = output;

}



function selectedRadio(sel){

  if(!sel || !sel.length){

     return null;

  }

  for(var i = 0; i<sel.length; i++){

     if(sel[i].checked){

        return sel[i].value;

     }

  }

  return null;

}



function checkAll(b, first_part){

   var elems = b.form.elements;

   for(var i = 0; i < elems.length; i++){

      if(elems[i].type == "checkbox" && elems[i].name.indexOf(first_part) == 0) {

         if (!elems[i].disabled) {

             elems[i].checked = b.checked;

         }

      }

   }

}



// Created by Oleg Velychko,  © Distributed Team