function afficher(element) {
	document.getElementsByName(element)[0].style.display="inline-block";
	document.getElementsByName(element)[0].style.visibility="true";
}

function cacher(element) {
	document.getElementsByName(element)[0].style.display="none";
	document.getElementsByName(element)[0].style.visibility="false";
}

function curseurPointeur(element) {
	document.getElementsByName(element)[0].style.cursor="pointer";
}

function curseurNormal(element) {
	document.getElementsByName(element)[0].style.cursor="auto";
}
	
function centrer_page(element) {
	document.getElementById(element).style.top='5px';
	document.getElementById(element).style.left='50%';
	document.getElementById(element).style.left=document.getElementById(element).offsetLeft-document.getElementById(element).offsetWidth/2+'px';
}