var timeout;
window.onload = function(){
	var ob = getElementsByClassName("newsandtopcs")[0];
	var obli = ob.getElementsByTagName("p");
	var counter = 0;
	timeout = setInterval(function(){
		obli[counter].style.display = "none";
		counter++;
		if(counter>obli.length-1) counter = 0;
		obli[counter].style.display = "block";
	}, 5000 );
}
window.onunload = function(){ clearInterval(timeout); }

function getElementsByClassName (className) {
  var children = document.getElementsByTagName('*') || document.all;
  var elements = new Array();
  for (var i = 0; i < children.length; i++) {
    var child = children[i];
    var classNames = child.className.split(' ');
    for (var j = 0; j < classNames.length; j++) {
      if (classNames[j] == className) {
        elements.push(child);
        break;
      }
    }
  }
  return elements;
}