/*
    Suckerfish dropdowns
*/
sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
	
}
if (window.attachEvent) window.attachEvent("onload", sfHover);


/*
    Change images on rollover
*/
function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document.images[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}


/*
    Empty form fields
*/
function clearText(objField){
	if (objField.defaultValue==objField.value)
	objField.value = ""
}

/*
    Preload images
*/
if (document.images) {
    
    abouton = new Image();
    abouton.src = "/images/bt_about_r.jpg";
    aboutoff = new Image();
    aboutoff.src = "/images/bt_about.jpg";
    
    newson = new Image();
    newson.src = "/images/bt_news_r.jpg";
    newsoff = new Image();
    newsoff.src = "/images/bt_news.jpg";
    
    plantson = new Image();
    plantson.src = "/images/bt_plants_r.jpg";
    plantsoff = new Image();
    plantsoff.src = "/images/bt_plants.jpg";
    
    serviceson = new Image();
    serviceson.src = "/images/bt_services_r.jpg";
    servicesoff = new Image();
    servicesoff.src = "/images/bt_services.jpg";
    
    responsibilityon = new Image();
    responsibilityon.src = "/images/bt_responsibility_r.jpg";
    responsibilityoff = new Image();
    responsibilityoff.src = "/images/bt_responsibility.jpg";
    
    contacton = new Image();
    contacton.src = "/images/bt_contact_r.jpg";
    contactoff = new Image();
    contactoff.src = "/images/bt_contact.jpg";
}