function changeimage(id, sMinus, sPlus) 
{ 
    var img = document.getElementById(id);
    if (img!=null) 
    { 
        var bExpand = img.src.indexOf(sPlus) >= 0;
        if (!bExpand)
            img.src = sPlus;
        else img.src = sMinus;
    }
}

function getElementsByClassName(strClass, strTag, objContElm) {
  strTag = strTag || "*";
  objContElm = objContElm || document;
  var objColl = objContElm.getElementsByTagName(strTag);
  if (!objColl.length &&  strTag == "*" &&  objContElm.all) objColl = objContElm.all;
  var arr = new Array();
  var delim = strClass.indexOf('|') != -1  ? '|' : ' ';
  var arrClass = strClass.split(delim);
  for (var i = 0, j = objColl.length; i < j; i++) {
    var arrObjClass = objColl[i].className.split(' ');
    if (delim == ' ' && arrClass.length > arrObjClass.length) continue;
    var c = 0;
    comparisonLoop:
    for (var k = 0, l = arrObjClass.length; k < l; k++) {
      for (var m = 0, n = arrClass.length; m < n; m++) {
        if (arrClass[m] == arrObjClass[k]) c++;
        if (( delim == '|' && c == 1) || (delim == ' ' && c == arrClass.length)) {
          arr.push(objColl[i]);
          break comparisonLoop;
        }
      }
    }
  }
  return arr;
}

// To cover IE 5.0's lack of the push method
Array.prototype.push = function(value) {
  this[this.length] = value;
}


function displayRow(strTipo)
{	

    if(strTipo == "captionRowBarrios")
        changeimage('imagesBarrios', 'images/menos.png', 'images/mas.png');
    else
        changeimage('imagesServicios', 'images/menos.png', 'images/mas.png');
        
    var myObjColl = getElementsByClassName(strTipo);
    for (var i = 0, j = myObjColl.length; i < j; i++) 
    {
        if(myObjColl[i].style.display == '')
            myObjColl[i].style.display = 'none';
        else
            myObjColl[i].style.display = '';
    }
}