/* http://www.css4design.com/blog/index.php/2006/07/05/25-menu-a-onglet-avec-javascript-et-css */
function multiClass(eltId) {
	arrLinkId = new Array('_0','_1','_2','_3','_4','_5','_6');
	intNbLinkElt = new Number(arrLinkId.length);
	arrClassLink = new Array('current','ghost');
	strContent = new String()
	for (i=0; i<intNbLinkElt; i++) {
		strContent = "sog"+arrLinkId[i];
		if ( arrLinkId[i] == eltId ) 
    {
			document.getElementById(arrLinkId[i]).className = arrClassLink[0];
			document.getElementById(strContent).className = 'on slide_content';
		} 
    else 
    {
			document.getElementById(arrLinkId[i]).className = arrClassLink[1];
			document.getElementById(strContent).className = 'off slide_content';
		}
	}
}