// JavaScript Document
function ShowHide(divId)
{
	var id = document.getElementById(divId);
	if (id.style.display == "none")
	{
		eval("id.style.display = 'block';"); //shows answer
	}
	else
	{
		eval("id.style.display = 'none';"); //hides answer
	}
}

function ShowHideAll(show)
{
    var divs = document.getElementsByTagName("div");
	for (var i = 0; i < divs.length; i++)
	{
		var divId = divs[i].id;
		if ( divId.indexOf("a_") == 0 )
		{
			if( true == show ) {
				eval("document.getElementById('" + divId + "').style.display = 'block'");
			} else {
			    eval("document.getElementById('" + divId + "').style.display = 'none'");
			}
		}
	}
}

function ToggleAnswers() {
    var tog = document.getElementById("Toggle");
        if( tog.innerHTML == "Show all answers") {
            ShowHideAll(true);
            tog.innerHTML = "Hide all answers";
        } else {
            ShowHideAll(false);
            tog.innerHTML = "Show all answers";
        }
}