function switchLang(from,to) {
    var currentStr = window.location.href;
    currentStr = currentStr.replace("/" + from + "/", "/" + to + "/");
    currentStr = currentStr.replace("lang=" + from, "lang=" + to);
    window.location.href = currentStr;
}


  function findPosX(obj)
  {
    var curleft = 0;
    if(obj.offsetParent)
        while(1) 
        {
          curleft += obj.offsetLeft;
          if(!obj.offsetParent)
            break;
          obj = obj.offsetParent;
        }
    else if(obj.x)
        curleft += obj.x;
    return curleft;
  }

  function findPosY(obj)
  {
    var curtop = 0;
    if(obj.offsetParent)
        while(1)
        {
          curtop += obj.offsetTop;
          if(!obj.offsetParent)
            break;
          obj = obj.offsetParent;
        }
    else if(obj.y)
        curtop += obj.y;
    return curtop;
  }
  
  var ie = (document.all) ? true : false;
  
  function checkShow(objClass){
	var arrObj = getElementByClass(objClass);
	if (arrObj != null && arrObj.length > 0){
	  for (i=0; i<arrObj.length; i++){
	    if (arrObj[i].style.display!="none")
	    	return true;
	  }
	}
	return false;
  }
  
  function hideClass(objClass){
	//alert(objClass);
    var arrObj = getElementByClass(objClass);
	if (arrObj != null && arrObj.length > 0){
      for (i=0; i<arrObj.length; i++){
	    arrObj[i].style.display="none";
	  }
	}
  }

  function showClass(objClass){
	//alert(objClass);
    var arrObj = getElementByClass(objClass);
    if (arrObj != null && arrObj.length > 0){
	  for (i=0; i<arrObj.length; i++){
	    arrObj[i].style.display="block";
	  }
	}
  }

  function getElementByClass(objClass){
    var elements = (ie) ? document.all : document.getElementsByTagName('*');
	var arrObj = new Array();
	for (i=0; i<elements.length; i++){
	//alert(elements[i].className + " " + objClass);
	  if (elements[i].className.indexOf(' ')>=0){
	    //alert (elements[i].className);
	    var elementClasses = elements[i].className.split(' ');
	    for (j=0; j<elementClasses.length; j++){
	      //alert(elementClasses[j]);
	      if (elementClasses[j] == objClass){
	        arrObj.push(elements[i]);
	        break;
	      }
	    }
	  }
	  else if (elements[i].className==objClass){
	    arrObj.push(elements[i]);
	  }
   }
   //alert(arrObj);
   return arrObj;
  }
  
  function chooseMedia(){
	var selObj = document.getElementById('catagory');
	hideClass('Video');showClass('Media');
	changeCat('Feed');
	selObj.selectedIndex = 0;
	//changeCat(selObj.options[selObj.selectedIndex].value);
	
  }
  
  function chooseVideo(){
	var selObj = document.getElementById('catagory');
	hideClass('Media');showClass('Video');
	changeCat('Feed');
	selObj.selectedIndex = 0;
	//changeCat(selObj.options[selObj.selectedIndex].value);
  }
  
  function changeCat(catagory){
	if (catagory == "Chlor"){
		if (checkShow('Video')){
		  hideClass('Feed');hideClass('Indust');showClass('Chlor');hideClass('Media');
		}
		else{
		  hideClass('Feed');hideClass('Indust');showClass('Chlor');hideClass('Video');
		}
	}
	else if (catagory == "Indust"){
		if (checkShow('Video')){
		  hideClass('Feed');hideClass('Chlor');showClass('Indust');hideClass('Media');
		}
		else{
		  hideClass('Feed');hideClass('Chlor');showClass('Indust');hideClass('Video');
		}
	}
    else {
    	if (checkShow('Video')){
    	  hideClass('Chlor');hideClass('Indust');showClass('Feed');hideClass('Media');
		}
		else{
		  hideClass('Chlor');hideClass('Indust');showClass('Feed');hideClass('Video');
		}
    }
  }