function buildZebraTable(tableId){
var table=document.getElementById(tableId);
if(!table){return};
var evenFlag=false;
var rows=document.getElementsByTagName('tr');
for(var i=0;i<rows.length;i++){
rows[i].className=!evenFlag?'oddrow':'evenrow';
evenFlag=!evenFlag;
}
}
window.onload=function(){
if(document.getElementById&&document.
getElementsByTagName&&document.createElement){
buildZebraTable('zebratable');
}
}