function stripe() {

    // the flag we'll use to keep track of 
    // whether the current row is odd or even
    var even = false;
  
    // if arguments are provided to specify the colours
    // of the even & odd rows, then use the them;
    // otherwise use the following defaults:
    var evenColor = arguments[1] ? arguments[1] : "#edf3fe";
    var oddColor = arguments[2] ? arguments[2] : "#fff";
  
    // obtain a reference to the desired table
    // if no such table exists, abort
    var table = document.getElementsByTagName("table");
    
    if (!table){
      
      return;
      
    } else{
      
      for (var t in table){
        
        // by definition, tables can have more than one tbody
        // element, so we'll have to get the list of child
        // <tbody>s 
        var tbodies = table[t].getElementsByTagName("tbody");
        
        // and iterate through them...
        for (var h = 0; h < tbodies.length; h++) {
        
         // find all the &lt;tr&gt; elements... 
          var trs = tbodies[h].getElementsByTagName("tr");
          
          // ... and iterate through them
          for (var i = 0; i < trs.length; i++) {

    	    // avoid rows that have a class attribute
            // or backgroundColor style
    	    if (! trs[i].style.backgroundColor) {
     
             // get all the cells in this row...
              var tds = trs[i].getElementsByTagName("td");
            
              // and iterate through them...
              for (var j = 0; j < tds.length; j++) {
            
                var mytd = tds[j];

                // avoid cells that have a class attribute
                // or backgroundColor style
    	        if (! mytd.style.backgroundColor) {
            
    		      mytd.style.backgroundColor = even ? evenColor : oddColor;
                  
                }
              }
            }
            // flip from odd to even, or vice-versa
            even =  ! even;
          }
        }
      }
    }
  }

window.onload = function() {
	stripe();
}