function alternate(id){
	if(document.getElementById(id)){	
		if(document.getElementById){
			var table = document.getElementById(id);
			var rows = table.getElementsByTagName("tr");
			for(i = 0; i < rows.length; i++){			
				doAlternate(rows[i], i);
			}
		}
	}
}

function doAlternate(row, i){
	if(i % 2 == 0){
		row.className = "listTableGrey";
	}else{
		row.className = "listTableWhite";
	}
}