function alternate(id){ 

 if(document.getElementsByTagName){  

   var table = document.getElementById(id);   

   var rows = table.getElementsByTagName("tr");   

   for(i = 0; i < rows.length; i++){           

 //manipulate rows 

     if(i % 2 == 0){ 

       rows[i].className = "even"; 

     }else{ 

       rows[i].className = "odd"; 

     }       

   } 

 } 

}

function alternateName(id){

/*
 if(document.getElementsByTagName){  
   
   var table = document.getElementsByName(id)[0];
   var rows = table.getElementsByTagName("tr");   

   for(i = 0; i < rows.length; i++){           

 //manipulate rows 

     if(i % 2 == 0){ 

       rows[i].className = "even"; 

     }else{ 

       rows[i].className = "odd"; 

     }       

   } 

 } 

*/

}