// return an object for a string or an object (just in case) 
var agent=navigator.userAgent.toLowerCase(); 
var isIE=(agent.indexOf('msie') != -1) ? true : false; 
var isDOM=(typeof(document.getElementById) != 'undefined' && !isIE) ? true : false; 
var isNav4=(agent.indexOf('mozilla') != -1 && !isDOM && !isIE) ? true : false; 
// return an object for a string or an object (just in case) 
function getObject(daName){ 
        var daObj; 
        if(typeof(daName) == "string"){ 
                if(isDOM){ 
                        daObj = document.getElementById(daName); 
                }else if(isIE){ 
                        daObj = eval("document.all." + daName); 
                }else{ 
                        daObj = eval("document." + daName); 
                } 
        }else{ 
                daObj = daName; 
        } 
        return daObj; 
}

function On(squareName){
	myObj = getObject(squareName); 
    myObj.className = 'MenuOn'; 
}
function Off(squareName){
	myObj = getObject(squareName); 
    myObj.className = 'MenuOff';
}
function show(layer) {
	myObj = getObject(layer);
	myObj.style.visibility = 'visible';
}
function hide(layer) {
	myObj = getObject(layer);
	myObj.style.visibility = 'hidden';
}
function maximize(layer) {
	myObj = getObject(layer);
	myObj.style.display = 'block';
}
function minimize(layer) {
	myObj = getObject(layer);
	myObj.style.display = 'none';
}