function addEvent(obj, event, fct) { if (obj.attachEvent)  { obj.attachEvent("on" + event, fct);  } else { obj.addEventListener(event, fct, true); } }
function onSameHeight(cols) {
	addEvent(window, 'load', function () {
		toString (cols); cols=cols.replace(/\ /g, '');
		var colsNb=cols.split(','); var colsList=new Array();
		for(i=0;i<colsNb.length;){colsList.push(document.getElementById(colsNb[i]).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++;}
	} );
}