function getElementsByClassName(oElm, strTagName, oClassNames) {
    var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
    var arrReturnElements = new Array();
    var arrRegExpClassNames = new Array();
    if (typeof oClassNames == "object") {
        for (var i = 0; i < oClassNames.length; i++) {
            arrRegExpClassNames.push(new RegExp("(^|\\s)" + oClassNames[i].replace(/\-/g, "\\-") + "(\\s|$)"));
        }
    } else {
        arrRegExpClassNames.push(new RegExp("(^|\\s)" + oClassNames.replace(/\-/g, "\\-") + "(\\s|$)"));
    }
    var oElement;
    var bMatchesAll;
    for (var j = 0; j < arrElements.length; j++) {
        oElement = arrElements[j];
        bMatchesAll = true;
        for (var k = 0; k < arrRegExpClassNames.length; k++) {
            if (!arrRegExpClassNames[k].test(oElement.className)) {
                bMatchesAll = false;
                break;                      
            }
        }
        if (bMatchesAll) {
            arrReturnElements.push(oElement);
        }
    }
    return (arrReturnElements);
}

function showBubble(id) {
    document.getElementById(id).style.display = "block";
}

function hideBubble(id) {
    document.getElementById(id).style.display = "none";
}
			
function hideAllBubbles() {
	var bubbles = getElementsByClassName(document, "div", "bubble");
	for (var i = 0; i < bubbles.length; i++) {
	  	
		bubbles[i].style.display = "none";
	}
}

window.onload = function() {
    hideAllBubbles(); 
	Nifty("div.bubble");
	initRollovers();
}