function checkSelection(){
el = document.forms[0].elements["rowNumber"];
	if (el!=null){
		for (var i=0;i<el.length;i++){
			if (el[i].checked == true){
				if (el[i].id=="Left"){
					document.getElementById('containerLeft').className = 'table_over';document.getElementById('containerRight').className = 'table_out';	
				}else if (el[i].id == "Right"){
					document.getElementById('containerRight').className = 'table_over';document.getElementById('containerLeft').className = 'table_out';
				}
			}
		}
	}
	
}