//var request = null;

function createRequest() {
 try {
   request = new XMLHttpRequest();
 } catch (trymicrosoft) {
   try {
	 request = new ActiveXObject("Msxml2.XMLHTTP");
   } catch (othermicrosoft) {
	 try {
	   request = new ActiveXObject("Microsoft.XMLHTTP");
	 } catch (failed) {
	   request = null;
	 }
   }
 }

 if (request == null)
   alert("Error creating request object!");
}

function replaceText(el, text) {
  if (el != null) {
    clearText(el);
    var newNode = document.createTextNode(text);
    el.appendChild(newNode);
  }
}

function clearText(el) {
  if (el != null) {
    if (el.childNodes) {
      for (var i = 0; i < el.childNodes.length; i++) {
        var childNode = el.childNodes[i];
        el.removeChild(childNode);
      }
    }
  }
}

function getText(el) {
  var text = "";
  if (el != null) {
    if (el.childNodes) {
      for (var i = 0; i < el.childNodes.length; i++) {
        var childNode = el.childNodes[i];
        if (childNode.nodeValue != null) {
          text = text + childNode.nodeValue;
        }
      }
    }
  }
  return text;
}

function f_field(f){ 
		var f_field_s = ""; 
		for( var i=0 ; i < f.elements.length; i++){ 
				if ( i > 0 ) f_field_s += "&"; 
				if ( f.elements[i].type == "button" || f.elements[i].type == "submit" || f.elements[i].type == "reset" ){
						if ( i > 0 ) f_field_s = f_field_s.substring(0,f_field_s.length -1); 
				}else if ( f.elements[i].type == "checkbox" || f.elements[i].type == "radio" ){ 
						if ( f.elements[i].checked )  f_field_s +=   f.elements[i].name  + "=" + encodeURIComponent( f.elements[i].value ); 
				} else{ 
						f_field_s +=  f.elements[i].name + "=" + encodeURIComponent( f.elements[i].value ); 
				} 
		} 
		return f_field_s; 
}