Usuari:Xavier Dengra/Proves3

function isClass(element, classe) {
    return hasClass(element, classe);
}
 
function whichClass(element, classes) {
    var s=" "+element.className+" ";
    for(var i=0;i<classes.length;i++)
        if (s.indexOf(" "+classes[i]+" ")>=0) return i;
    return -1;
}
 
function hasClass(node, className) {
  if (node.className == className) {
    return true;
  }
  var reg = new RegExp('(^| )'+ className +'($| )')
  if (reg.test(node.className)) {
    return true;
  }
  return false;
}
 
function addClass(node, className) {
    if (hasClass(node, className)) {
        return false;
    }
    node.className += ' '+ className;
    return true;
}
 
function removeClass(node, className) {
  if (!hasClass(node, className)) {
    return false;
  }
  node.className = eregReplace('(^|\\s+)'+ className +'($|\\s+)', ' ', node.className);
  return true;
}
 
function eregReplace(search, replace, subject) {
    return subject.replace(new RegExp(search,'g'), replace);
}
//