// Utility library of JS functions

function hideContent(d) {
	document.getElementById(d).style.display = "none";
}

function showContent(d) {
	document.getElementById(d).style.display = "block";
}

function reverseDisplay(d) {
	if(document.getElementById(d).style.display == "none") 
	{ 
		document.getElementById(d).style.display = "block"; 
	} else 
	{ 
		document.getElementById(d).style.display = "none"; 
	}
}

function playSound(soundfile) 
{
	document.getElementById("dummy").innerHTML=
    "<embed src=\""+soundfile+"\" hidden=\"true\" autostart=\"true\" loop=\"false\" />";
}

function setImgSrc(elementId, imgSrc)
{
	document[elementId].src = imgSrc;
}