/* Author: Simon Willison
 * http://simon.incutio.com/archive/2004/05/26/addLoadEvent
 */
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}


/* Standards Compliant Rollover Script
   http://www.bleedingego.co.uk/webdev.php */
function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('img');

	for (var i = 0; i < aImages.length; i++) {
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_on'+ftype);
			
			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_on'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

function payPalSubmit() {
	if(!document.getElementById) return false;
	if(!document.getElementsByTagName) return false;
	if(!document.getElementById("paypal")) return false;

	document.getElementById("paypal").submit();
}

function courseCost() {
	var finalCost;
	if (document.paypal.isMember[0].checked) {
		finalCost = parseInt(document.paypal.memberCost.value);
	}
	else if (document.paypal.isMember[1].checked) {
		finalCost = parseInt(document.paypal.nonmemberCost.value);
	}
	else if (document.paypal.isMember[2].checked) {
		finalCost = parseInt(document.paypal.memberCost.value);
		finalCost = finalCost+40;
	}
	else {
		finalCost = document.paypal.nonmemberCost.value;
	}

	document.paypal.amount.value = finalCost;
}

function adjustCost() {
	if(!document.getElementById) return false;
	if(!document.getElementsByTagName) return false;
	if(!document.getElementById("paypal")) return false;

	var courseForm = document.getElementById("paypal");
	var inputs = courseForm.getElementsByTagName("input");

	for(i=0;i<inputs.length;i++) {
		if(inputs[i].name == 'isMember') {
			inputs[i].onclick = function() {
				courseCost();
			}
		}
	}
}

function loads() {
	initRollovers();
	adjustCost();
}

/* sets up the rollovers */
addLoadEvent(loads);