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

// Really handy function. Adds any class you want to any element you want.

function addClass(element,value) {
  if (!element.className) {
    element.className = value;
  } else {
    newClassName = element.className;
    newClassName+= " ";
    newClassName+= value;
    element.className = newClassName;
  }
}

// Finds all the elements of a certain class. Pretty handy.

function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

// Begin popup window function.
window.onload = function() {
  if (!document.getElementsByTagName) return false;
  
  var lnks = document.getElementsByTagName("a");
  
  for (var i=0; i<lnks.length; i++) {
  
    if (lnks[i].getAttribute("class") == "popup1") {
      lnks[i].onclick = function() {
        popUpSmall(this.getAttribute("href"));
        return false;
      }  
      }
    else if (lnks[i].getAttribute("class") == "popup2") {
    	lnks[i].onclick = function() {
    	popUpMedium(this.getAttribute("href"));
    	return false;
    	}
    }
    
    else if (lnks[i].getAttribute("class") == "popupbig") {
    	lnks[i].onclick = function() {
    	popUpBig(this.getAttribute("href"));
    	return false;
    	}
    }
  }
}

// uses class attribute of link to determine side of image.
function popUpSmall(winURL) {
  window.open(winURL,"popup1","width=720,height=485");
}

function popUpMedium(winURL) {
	window.open(winURL,"popup2","width=720,height=556");
}

function popUpBig(winURL) {
	window.open(winURL,"popupbig","width=800,height=600");
}

// End popup functions.

// Begin