function table_alt_row (thistable){
	var table_list = thistable;
	if(document.getElementById) {
		if(document.getElementsByTagName) {  
			var list = document.getElementById(table_list);   
			var rows = list.getElementsByTagName("tr");   
			for(i = 0; i < rows.length; i++) {           
				//manipulate rows 
				if(i % 2 == 0) { 
					rows[i].className = "odd"; 
				} else { 
					rows[i].className = "even"; 
				}
			}       
		} 
	}
}