function showHideOptimal() {
	  
jQuery(document.getElementById('lexelOptimal')).slideDown('500');

}

function showHideOffre() {

jQuery(document.getElementById('offreMomment')).slideDown('500');

}

function showHideCoffret() {

jQuery(document.getElementById('coffretMomment')).slideDown('500');

}

function closeInit(elem)  {
jQuery(document.getElementById(elem)).slideUp('200');
}