function collapse(item,val1)
{
  document.getElementById(item).style.display=val1;
}


function toggle(item) {
	obj = document.getElementById(item);
	if (obj.style.display !== "none") {
		obj.style.display = "none";
	}else if (obj.style.display == "none") {
		obj.style.display = "block";
	}
}


sfHover = function() {
	var subEls = document.getElementById("subNav").getElementsByTagName("li");

	for (var i=0; i<subEls.length; i++) {
		createMouseOver(subEls[i]);
	}
	
	var topEls = document.getElementById("topNav").getElementsByTagName("li");

	for (var i=0; i<topEls.length; i++) {
		createMouseOver(topEls[i]);
	}
	
	function createMouseOver (ele) {
		ele.onmouseover=function() {
			this.className+=" sfhover";
		}
		ele.onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}

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

if (window.attachEvent) window.attachEvent("onload", sfHover);
//addLoadEvent('sfHover');


function IsNumeric(sText) {
	var ValidChars = "0123456789.";
 	var IsNumber=true;
	var Char;
	for (i = 0; i < sText.length && IsNumber == true; i++) { 
		Char = sText.charAt(i); 
		if (ValidChars.indexOf(Char) == -1) {
			IsNumber = false;
			return "";
		}
	}
   return IsNumber;
}

function updateField() {
	adultAmt = document.getElementById('adultAmt').value;
	adultTotal = document.getElementById('adultTotal');
	if (adultAmt != "" && IsNumeric(adultAmt) != ""){
		adultTotal.value = "$"+(adultAmt*7)+".00";
	} else {
		adultTotal.value = "";
	}
	
	studentAmt = document.getElementById('studentAmt').value;
	studentTotal = document.getElementById('studentTotal');
	if (studentAmt != "" && IsNumeric(studentAmt) != ""){
		studentTotal.value = "$"+(studentAmt*7)+".00";
	} else {
		studentTotal.value = "";
	}
	
	if (studentTotal.value != "" && adultTotal.value != "") {
		document.getElementById('total').value = "$"+((studentAmt*7)+(adultAmt*7))+".00";
	} else {
		document.getElementById('total').value = "";
	}
}