var classN = "hspeed";
var addClass1 = "line1";
var addClass2 = "line2";
 
//---------------------------------
 
function tableEvent() {
    if (!document.getElementsByTagName) return false;
 
    var eventTables = document.getElementsByTagName("table");
    
    for (var i=0; i < eventTables.length; i++) {
        if (eventTables[i].className.match(classN)) {
 
            var eventRows = eventTables[i].getElementsByTagName("tr");
            
            for (var k=0; k < eventRows.length; k++) {
                if (k%2) {
                    eventRows[k].className = addClass1;
                } else {
                    eventRows[k].className = addClass2;
                }
            }
        }
    }
}

try{
	window.addEventListener("load",tableEvent,false);
}catch(e){
	window.attachEvent("onload",tableEvent);
}