var oldClassName = "";
var oldtrObj;
var oldtrCss = "";
function onMouseOver(cssSelect,cssOver,cssOut) {
    try{
        var trObj = event.srcElement.parentElement;
        if (trObj.className != cssSelect){
            oldClassName = trObj.className;
            trObj.className = cssOver; 
        }
    }catch(e){
        e.description;
    }
} 
 
function onMouseOut(cssSelect,cssOver,cssOut){ 
    try{
        var trObj = event.srcElement.parentElement;    
        if (trObj.className != cssSelect){
            trObj.className = oldClassName;
        }
    }catch(e){
        e.description;
    }    
} 
function onClick(cssSelect,cssOver,cssOut){
    try{
        var trObj = event.srcElement;
        if (oldtrObj){
            oldtrObj.className = oldtrCss;
        }
        if (oldClassName == ""){
            oldClassName = trObj.className;
        }

        trObj.className = cssSelect;
        oldtrCss = oldClassName;
        oldtrObj = trObj;
    }catch(e){
        e.description;
    }
}