function changeTickerBox(id) {
  tic = getXMLRequester();
  tic.open("GET", '/ajax_ticker.php', true);
	tic.onreadystatechange = function(){            
    switch(tic.readyState) {
            case 4:
            if(tic.status==200) {
                document.getElementById(id).innerHTML = tic.responseText;
             }
            break;
    
            default:
              return false;
            break;     
        }
    };
    tic.setRequestHeader("Content-Type","text/html");
    tic.send(null);
}

function changeRotationBox(id) {
  opacity('rotation1',100,0,500);
  rot = getXMLRequester();
  rot.open("GET", '/ajax_rotation.php', true);
	rot.onreadystatechange = function(){            
    switch(rot.readyState) {
            case 4:
            if(rot.status==200) {
                document.getElementById(id).innerHTML = rot.responseText;
                opacity('rotation1',0,100,500);
            }
            break;
    
            default:
              return false;
            break;     
        }
    };
    rot.setRequestHeader("Content-Type","text/html");
    rot.send(null);
    window.setTimeout("changeRotationBox('rotation1')", 15000);
}

function topflop(link_id,vote,beitrag_id,control) {
  opacity('topflop-'+link_id+'-'+control+'',100,0,1000);
  window.setTimeout('topflop_delete('+link_id+','+control+')', 1000);
  tf = getXMLRequester();
  tf.open("GET", '/ajax_topflop.php?link_id='+link_id+'&vote='+vote+'&beitrag_id='+beitrag_id+'', true);
	tf.onreadystatechange = function(){            
    switch(tf.readyState) {
            case 4:
            if(tf.status==200) {
                if (tf.responseText == "0") {
                  alert("Du hast erst kürzlich für diesen Beitrag gestimmt.");
                }
                if (tf.responseText == "2") {
                  alert("Es ist ein Fehler aufgetreten.");
                }
                if (tf.responseText == "3") {
                  alert("Diese Funktion steht nur angemeldeten Benutzern zur Verfügung.\nHinweis: Du kannst dich auch als Leser registrieren, dafür benötigst du kein eigenes Weblog.");
                }
                if (tf.responseText == "4") {
                  alert("Für eigene Beiträge kannst du nicht abstimmen.");
                }
             }
            break;
    
            default:
              return false;
            break;     
        }
    };
    tf.setRequestHeader("Content-Type","text/html");
    tf.send(null);
}

function topflop_delete (id,control) {
  document.getElementById('topflop-'+id+'-'+control+'').innerHTML = "";
}

function opacity_rotation(id,start,end,time) {
  opacity(id,start,end,time);
}

//--------------------------------------------------
//Blend-Funktionen

function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	if(opacStart > opacEnd) {
		for(i = opacStart; i >= opacEnd; i--) {
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
			timer++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var object = document.getElementById(id).style; 
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

	//fade in image
	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}