function getRandomValue(numBlock){
	return Math.ceil(Math.random()*numBlock);
}

function displayRandomDiv(divName, numBlock){
	if (numBlock > 1 ){
		var elem1 = document.getElementById(divName + "1");
		if (elem1){
			elem1.style.display="none";
		} 
	}
	var chosen = getRandomValue(numBlock);
	var elem = document.getElementById(divName + chosen);
	if (elem){
		elem.style.display="";
	} 
}

function overUniverse(elem){
	elem.style.position="relative";
	elem.style.top="-40px";
}
function outUniverse(elem){
	elem.style.top="0px";
}

function toggleUnivLinks() {
	var elem = document.getElementById("universe_links_content");
	if (elem.style.display) {
		elem.style.display = '';
	} else {
		elem.style.display = 'none';
	}
}

function trim (myString)
{
return myString.replace(/^\s+/g,'').replace(/\s+$/g,'')
}