var count = 0;
function handleErrFullPage(strIn) {

        var errorWin;

        // Create new window and display error
        try {
                errorWin = window.open('', 'errorWin');
                errorWin.document.write(strIn);
        }
        // If pop-up gets blocked, inform user
        catch(e) {
                alert('An error occurred, but the error message cannot be' +
                        ' displayed because of your browser\'s pop-up blocker.\n' +
                        'Please allow pop-ups from this Web site.');
        }
}
function setReadonly()
{
	var inputs = document.getElementsByTagName('input');
	if(inputs.length > 0)
	{
	for(var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].type == 'text' || inputs[i].type == 'radio' || inputs[i].type == 'checkbox')
		{
			
			inputs[i].onclick = function(){return false};
			inputs[i].setAttribute('readonly','readonly');
			inputs[i].setAttribute('disabled','disabled');
		}
	}
	}
}
function removeDisable()
{
	var inputs = document.getElementsByTagName('input');
	if(inputs.length > 0)
	{
	for(var i = 0; i < inputs.length; i++)
	{
		if(inputs[i].type == 'text' || inputs[i].type == 'radio' || inputs[i].type == 'checkbox')
		{
		
			inputs[i].removeAttribute('disabled');
		}
	}
	}	
	var selects = document.getElementsByTagName('select');
	if(selects.length > 0)
	{
	for(var i = 0; i < selects.length; i++)
	{
		selects[i].removeAttribute('disabled');
	}
	}
}
function initTables() {
	var _tables = document.getElementsByTagName("tr");
	for (i = 0; i < _tables.length; i++)
	{
		_tables[i].onmouseover = function() {
			if (this.className.indexOf("hover") == -1) {
				this.className += " hover";
			}
		};
		_tables[i].onmouseout = function() {
			this.className = this.className.replace("hover", "");
		};
	}
}

function initForm() {
	var mform = document.getElementById("main-form");
	if (mform) {
		var _links = document.getElementsByTagName("a");
		for (i = 0; i < _links.length; i++)
		{
			if ((_links[i].className.indexOf("button") != -1) && (_links[i].parentNode.className.indexOf("selector") != -1))
			{
				_links[i].onmouseover = function() {
						if (this.parentNode.className.indexOf("selectorhover") == -1)
						{
							this.parentNode.className += " selectorhover";
						}
				};
				_links[i].onmouseout = function() {
						this.parentNode.className = this.parentNode.className.replace("selectorhover", "");
				};
				_links[i].onclick = function() {
						return false;
				};
			}
		}
	}
	var submits = document.getElementsByTagName('input');
	if(submits.length > 0)
	{
		for(var j = 0; j < submits.length; j++)
		{
			if(submits[j].type == 'submit')
			{
				submits[j].onclick = function(){removeDisable()};	
			}
		}
	}
}
function shuffleSelect()
{
	/*shuffle = function(o){
		for(var j, x, i = o.length; i; j = parseInt(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
		return o;
	};
			var theselects = document.getElementsByTagName('select');
		for(var i = 0; i < theselects.length; i++)
		{
			var arr = Array();
			theoptions = theselects[i].getElementsByTagName('option');
			for(var j = 1; j < theoptions.length; j++)
			{
				selected = (theoptions[j].getAttribute('selected') == 'selected') ? true : false;
			arr.push(new Array(theoptions[j].value,selected));
			}
			theselects[i].length = 1;
			shuffle(arr);
			for(var k = 1; k <= arr.length; k++)
			{
				theselects[i].options[theselects[i].options.length] = new Option(arr[k][0],arr[k][0],arr[k][1]);
			}
			
		}	*/
		return true;
}
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}
function checkAnswer(m,a,q,what)
{
	$.post("check.php", { module: m, activity: a, qnum: q, answer: what },
	function(data){
		var results = data.split('_');
		var text = results[0];
		var correct = results[1];
		var answer = results[2];
		if(correct == 0)
		{
			if(text != '')
			{
				if(answer != '')
			document.getElementById('result').setAttribute("href","result.php?module="+m+"&activity="+a+"&qnum="+q+"&answer="+answer);
			else
			document.getElementById('result').setAttribute("href","result.php?module="+m+"&activity="+a+"&qnum="+q);
			$('a.zoom').click();
			}
			document.getElementById('status_m'+m+'_a'+a+'_q'+q).innerHTML = '<img src="images/false.gif" alt="" class="status" />';	
		}
		else
		{
			if(text != '')
			{
			document.getElementById('result').setAttribute("href","result.php?module="+m+"&activity="+a+"&qnum="+q);
			$('a.zoom').click();
			}
			document.getElementById('status_m'+m+'_a'+a+'_q'+q).innerHTML = '<img src="images/true.gif" alt="" class="status" />';	
		}
	});
	
}
function checkAnswer2(m,a,q,what)
{
	$.post("check.php", { module: m, activity: a, qnum: q, answer: what },
	function(data){
		var results = data.split('_');
		var text = results[0];
		var correct = results[1];
				if(correct == 0)
		{
			if(text != '')
			{
			document.getElementById('result').setAttribute("href","result.php?module="+m+"&activity="+a+"&qnum="+q);
			$('a.zoom').click();
			}
			if(count > 0) count--;
			document.getElementById('status_m'+m+'_a'+a+'_q'+q).innerHTML = '<img src="images/false.gif" alt="" class="status" />';	
		}
		else
		{
			if(text != '')
			{
			document.getElementById('result').setAttribute("href","result.php?module="+m+"&activity="+a+"&qnum="+q);
			$('a.zoom').click();
			}
			document.getElementById('status_m'+m+'_a'+a+'_q'+q).innerHTML = '<img src="images/true.gif" alt="" class="status" />';	
			count++;
		}
		document.getElementById('result').setAttribute("href","result2.php?module="+m+"&activity="+a+"&qnum="+q);
		$('a.zoom').click();
		if(document.getElementById('piechart'))
		{
			var el = document.getElementById('piechart');
			if(count >= 5)
			{
				el.style.display = 'block';
			}
			else if(count < 5)
			{
				el.style.display = 'none';
			}
		}
	});
}
if (window.addEventListener) {
	window.addEventListener("load", initForm, false);
}
else if (window.attachEvent && !window.opera) {
	window.attachEvent("onload", initTables);
	window.attachEvent("onload", initForm);
}