function addEvent(obj, event, fct) { if (obj.attachEvent)  { obj.attachEvent("on" + event, fct);  } else { obj.addEventListener(event, fct, true); } }
/*
		colsToResize = 'page, bloc-center, sideBar';
		addEvent(window, 'load', function(){onSameHeight(colsToResize);});
		onSameHeight(colsToResize
*/
function onSameHeight(cols) {
	toString (cols); cols=cols.replace(/\ /g, '');
	var colsNb=cols.split(','); var colsList=new Array();
	for(i=0;i<colsNb.length;){
		col = document.getElementById(colsNb[i]);
		col.style.height='auto';
		colsList.push(col.clientHeight);
		i++;
	}
	colsList.sort(function(n1,n2){return n2-n1;});var colsSize=colsList[0];
	for(i=0;i<colsNb.length;){document.getElementById(colsNb[i]).style.height=colsSize+'px';i++;
	}
}