function getElementsByClassName(oElm, strTagName, strClassName){
    var arrElements = (strTagName == "*" && document.all)? document.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    strClassName = strClassName.replace(/\-/g, "\\-");
    var oRegExp = new RegExp("(^|\\s)" + strClassName + "(\\s|$)");
    var oElement;
    for(var i=0; i<arrElements.length; i++){
        oElement = arrElements[i];      
        if(oRegExp.test(oElement.className)){
            arrReturnElements.push(oElement);
        }   
    }
    return (arrReturnElements)
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function swapMainImg() {
	var mainImage = document.getElementById('mainImage');
	if (mainImage != null) {
		var images = this.getElementsByTagName("img");
		if (images != null && images.length > 0) {
			mainImage.src = this.getAttribute("href");
			mainImage.removeAttribute("width");
			mainImage.removeAttribute("height");			
			mainImage.setAttribute("title",images[0].getAttribute("title"));				
			mainImage.setAttribute("alt",images[0].getAttribute("alt"));				
			return false;			
		}					
	}
}

function setupMainImageSwitching() {
	var imageActuators = getElementsByClassName(document,"a","mainImgActuator");
	for (i=0; i<imageActuators.length; i++) {
		imageActuators[i].onclick = swapMainImg;
	}
}

$(document).ready(function(){
    setupMainImageSwitching();
    
});