/**
 * @author alexanderfried
 */


function setStartX(id){
	
	var width = document.getElementById("bubbleWrapper").offsetWidth;
	var height = document.getElementById("bubbleWrapper").offsetHeight;
	
	var startX = parseInt(width)/2;

	//offset vom bubble noch abziehen
	startX = startX - parseInt(document.getElementById(id).offsetWidth) / 2;
	
	return startX;
}

function setStartY(id){
	var width = document.getElementById("bubbleWrapper").offsetWidth;
	var height = document.getElementById("bubbleWrapper").offsetHeight;
	
	var startY = parseInt(height)/2;
	startY = startY - parseInt(document.getElementById(id).offsetHeight) / 2;
	return startY;	
}

function orderBubbles(){
	
    //-1 weil main bubble center ausgenommen
    var angleStep = 2 * Math.PI / (getElementsByClassName("bubble").length - 1);
    var radius = document.getElementById("bubbleWrapper").offsetHeight/2 - 5;
    
    //bubble 0 = main bubble = center
    for (var i = 0; i < getElementsByClassName("bubble").length; i++) {
    
        var random = Math.random();
        var angle = angleStep * i;
       	var id = "bubble" + i;
       
	   
        //i == 0 ist das mittelelement
        if (i != 0) {
			
	    var x = parseInt(setStartX(id)) + 1.8 * (radius - 40 * random) * Math.cos(angle);
            var y = parseInt(setStartY(id)) + (radius - 40 * random) * Math.sin(angle);
			
            var fontSize = 11 + random * 6;
            
        }
        else {
            var x = parseInt(setStartX(id));
            var y = parseInt(setStartY(id));
			
            var fontSize = 20;
        }
        
       
	    document.getElementById(id).style.left = x + "px";
            document.getElementById(id).style.top = y + "px";
    	    document.getElementById(id).style.fontSize = fontSize + "pt";   	
    }
    bubbleshow();
}

function bubbleshow()
{
	for(var i = 0; i < getElementsByClassName("bubble").length; i++){
	    var obj = document.getElementById("bubble"+i);
	    obj.style.display = "block";
	    obj.style.opacity = 1;
	    obj.style.MozOpacity = 1;
	    obj.style.KhtmlOpacity = 1;
	    obj.style.filter = "alpha(opacity=100)"; 
	}
}

function fadeoutExcept(id, url)
{
	for(var i = 0; i < getElementsByClassName("bubble").length; i++){
		var idOther = "bubble" + i;
		//das das angeklickt wurde nicht ausblenden
		if(id != idOther ) fadeout(idOther);
	}
	window.setTimeout("self.location.href='"+url+"';",1500);
	return false;
}
	
function fadeout(id) {
    tmp=0;
    for(i = 10; i >= 0; i--) {
        setTimeout("fadeout2('" + id + "'," + i + ")", 150 * tmp);
        tmp++;
    }
}

function fadeout2(id, pas) {
	var element = document.getElementById(id).style;
	if(pas > 0) {
		element.opacity = (pas / 10);
		element.MozOpacity = (pas / 10);
		element.KhtmlOpacity = (pas / 10);
		element.filter = "alpha(opacity=" + pas * 10 + ")"; 
	} else {
		element.display = "none";
	}
}

/*
	Developed by Robert Nyman, http://www.robertnyman.com
	Code/licensing: http://code.google.com/p/getelementsbyclassname/
*/
var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1){
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};