// this function is needed to work around 
  // a bug in IE related to element attributes
  function hasClass(obj) {
     var result = false;
     if (obj.getAttributeNode("class") != null) {
         result = obj.getAttributeNode("class").value;
     }
     return result;
  }   

function stripe() {
	var even = true;
	var tables = document.getElementsByTagName("table");	
	
	for(x=0;x!=tables.length;x++){
		table = tables[x];
		if (! table) { return; }
		
		var tbodies = table.getElementsByTagName("tbody");
		
		for (var h = 0; h < tbodies.length; h++) {
			var trs = tbodies[h].getElementsByTagName("tr");
			
			for (var i = 0; i < trs.length; i++) {
				
				if (! hasClass(trs[i]) && ! trs[i].style.backgroundColor) {
					trs[i].className = even ? "even" : "";
				}
				// flip from odd to even, or vice-versa
				even =  ! even;
			}
		}
	}
}