// define 'buildZebraTable()' function

function buildZebraTable(tableId){

var table=document.getElementById(tableId);

if(!table){return};

// get all <tbody> table elements

var tbodies=document.getElementsByTagName('tbody');

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

var evenFlag=false;

// get all <tr> table elements

var trows=document.getElementsByTagName('tr');

for(var j=0;j<trows.length;j++){

// assign background color to even and odd rows

trows[j].style.backgroundColor=!evenFlag?'#e1dfd3':'';

evenFlag=!evenFlag;

}

}

}

// run 'buildZebraTable()' function when web page is loaded

window.onload=function(){

if(document.getElementById&&document.
getElementsByTagName&&document.createElement){

buildZebraTable('zebratable');

}

}