Wie kann man beim Überstreichen eines Textes mit der Maus ein Bild anzeigen?

In Frontpage gibt es die Möglichkeit, mit Hilfe der Dynamischen Schaltflächen einen MouseOver-Effekt zu erzielen. Das heißt, beim Positionieren der Maus auf einen Bereich (ohne Klicken) verändert sich das Original. Bei einem Textbereich kann man die Schriftart oder -farbe ändern bzw. es können Bilder ausgetauscht werden, je nach dem, ob die Maus auf dem Bereich steht oder außerhalb.

Man kann aber nicht beim Positionieren auf einen Text ein Bild einblenden. Das wünscht man sich z.B. bei der Auflistung von Personen und ihrem Aufgabengebiet. Beim Positionieren der Maus auf einen Namen sollte das dazugehörige Foto eingeblendet werden.

Das Problem wurde per Javascript gelöst und kann nach der notwendigen Modifikation (Eintragen aller benötigten Bilder, Alternativtexte, Hintergrundfarbe u.v.m) direkt verwendet werden.

Quelle: http://www.dynamicdrive.com/dynamicindex4/imagetooltip.htm

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Code: (im Header)

<script type="text/javascript">

/***********************************************
* Image w/ description tooltip- By Dynamic Web Coding (www.dyn-web.com)
* Copyright 2002-2007 by Sharon Paine
* Visit Dynamic Drive at http://www.dynamicdrive.com/ for full source code
***********************************************/

/* IMPORTANT: Put script after tooltip div or 
    put tooltip div just before </BODY>. */

var dom = (document.getElementById) ? true : false;
var ns5 = (!document.all && dom || window.opera) ? true: false;
var ie5 = ((navigator.userAgent.indexOf("MSIE")>-1) && dom) ? true : false;
var ie4 = (document.all && !dom) ? true : false;
var nodyn = (!ns5 && !ie4 && !ie5 && !dom) ? true : false;

var origWidth, origHeight;

// avoid error of passing event object in older browsers
if (nodyn) { event = "nope" }

///////////////////////  CUSTOMIZE HERE   ////////////////////
// settings for tooltip 
// Do you want tip to move when mouse moves over link?
var tipFollowMouse= true;   
// Be sure to set tipWidth wide enough for widest image
var tipWidth= 160;
var offX= 20;   // how far from mouse to show tip
var offY= 12; 
var tipFontFamily= "Verdana, arial, helvetica, sans-serif";
var tipFontSize= "8pt";
// set default text color and background color for tooltip here
// individual tooltips can have their own (set in messages arrays)
// but don't have to
var tipFontColor= "#000000";
var tipBgColor= "#DDECFF"; 
var tipBorderColor= "#000080";
var tipBorderWidth= 3;
var tipBorderStyle= "ridge";
var tipPadding= 4;

// tooltip content goes here (image, description, optional bgColor, optional textcolor)
var messages = new Array();
// multi-dimensional arrays containing: 
// image and text for tooltip
// optional: bgColor and color to be sent to tooltip
messages[0] = new Array('red_balloon.gif','Here is a red balloon on a white background',"#FFFFFF");
messages[1] = new Array('duck2.gif','Here is a duck on a light blue background.',"#DDECFF");
messages[2] = new Array('test.gif','Test description','black','white');

////////////////////  END OF CUSTOMIZATION AREA  ///////////////////

// preload images that are to appear in tooltip
// from arrays above
if (document.images) {
   var theImgs = new Array();
   for (var i=0; i<messages.length; i++) {
     theImgs[i] = new Image();
      theImgs[i].src = messages[i][0];
  }
}

// to layout image and text, 2-row table, image centered in top cell
// these go in var tip in doTooltip function
// startStr goes before image, midStr goes between image and text
var startStr = '<table width="' + tipWidth + '"><tr><td align="center" width="100%"><img src="';
var midStr = '" border="0"></td></tr><tr><td valign="top">';
var endStr = '</td></tr></table>';

////////////////////////////////////////////////////////////
//  initTip   - initialization for tooltip.
//      Global variables for tooltip. 
//      Set styles
//      Set up mousemove capture if tipFollowMouse set true.
////////////////////////////////////////////////////////////
var tooltip, tipcss;
function initTip() {
   if (nodyn) return;
   tooltip = (ie4)? document.all['tipDiv']: (ie5||ns5)? document.getElementById('tipDiv'): null;
   tipcss = tooltip.style;
   if (ie4||ie5||ns5) {   // ns4 would lose all this on rewrites
      tipcss.width = tipWidth+"px";
      tipcss.fontFamily = tipFontFamily;
      tipcss.fontSize = tipFontSize;
      tipcss.color = tipFontColor;
      tipcss.backgroundColor = tipBgColor;
      tipcss.borderColor = tipBorderColor;
      tipcss.borderWidth = tipBorderWidth+"px";
      tipcss.padding = tipPadding+"px";
      tipcss.borderStyle = tipBorderStyle;
   }
   if (tooltip&&tipFollowMouse) {
      document.onmousemove = trackMouse;
   }
}

window.onload = initTip;

/////////////////////////////////////////////////
//  doTooltip function
//         Assembles content for tooltip and writes 
//         it to tipDiv
/////////////////////////////////////////////////
var t1,t2;   // for setTimeouts
var tipOn = false;   // check if over tooltip link
function doTooltip(evt,num) {
   if (!tooltip) return;
   if (t1) clearTimeout(t1);   if (t2) clearTimeout(t2);
   tipOn = true;
   // set colors if included in messages array
   if (messages[num][2])   var curBgColor = messages[num][2];
   else curBgColor = tipBgColor;
   if (messages[num][3])   var curFontColor = messages[num][3];
   else curFontColor = tipFontColor;
   if (ie4||ie5||ns5) {
      var tip = startStr + messages[num][0] + midStr + '<span style="font-family:' + tipFontFamily + '; font-size:' + tipFontSize + '; color:' + curFontColor + ';">' + messages[num][1] + '</span>' + endStr;
      tipcss.backgroundColor = curBgColor;
       tooltip.innerHTML = tip;
   }
   if (!tipFollowMouse) positionTip(evt);
   else t1=setTimeout("tipcss.visibility='visible'",100);
}

var mouseX, mouseY;
function trackMouse(evt) {
   standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body //create reference to common "body" across doctypes
   mouseX = (ns5)? evt.pageX: window.event.clientX + standardbody.scrollLeft;
   mouseY = (ns5)? evt.pageY: window.event.clientY + standardbody.scrollTop;
   if (tipOn) positionTip(evt);
}

/////////////////////////////////////////////////////////////
//  positionTip function
//      If tipFollowMouse set false, so trackMouse function
//      not being used, get position of mouseover event.
//      Calculations use mouseover event position, 
//      offset amounts and tooltip width to position
//      tooltip within window.
/////////////////////////////////////////////////////////////
function positionTip(evt) {
   if (!tipFollowMouse) {
      standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
      mouseX = (ns5)? evt.pageX: window.event.clientX + standardbody.scrollLeft;
      mouseY = (ns5)? evt.pageY: window.event.clientY + standardbody.scrollTop;
   }
   // tooltip width and height
   var tpWd = (ie4||ie5)? tooltip.clientWidth: tooltip.offsetWidth;
   var tpHt = (ie4||ie5)? tooltip.clientHeight: tooltip.offsetHeight;
   // document area in view (subtract scrollbar width for ns)
   var winWd = (ns5)? window.innerWidth-20+window.pageXOffset: standardbody.clientWidth+standardbody.scrollLeft;
   var winHt = (ns5)? window.innerHeight-20+window.pageYOffset: standardbody.clientHeight+standardbody.scrollTop;
   // check mouse position against tip and window dimensions
   // and position the tooltip 
   if ((mouseX+offX+tpWd)>winWd) 
      tipcss.left = mouseX-(tpWd+offX)+"px";
   else tipcss.left = mouseX+offX+"px";
   if ((mouseY+offY+tpHt)>winHt) 
      tipcss.top = winHt-(tpHt+offY)+"px";
   else tipcss.top = mouseY+offY+"px";
   if (!tipFollowMouse) t1=setTimeout("tipcss.visibility='visible'",100);
}

function hideTip() {
   if (!tooltip) return;
   t2=setTimeout("tipcss.visibility='hidden'",100);
   tipOn = false;
}

document.write('<div id="tipDiv" style="position:absolute; visibility:hidden; z-index:100"></div>')

</script>

Code: (im Body)

<a href="#" onmouseover="doTooltip(event,0)" onmouseout="hideTip()">Link 1</a><br>
<a href="#" onmouseover="doTooltip(event,1)" onmouseout="hideTip()">Link 2</a>

Die Nummern 0 bzw. 1 sind der Bildindex in dem Script (messages[n]...) oben.

-- KerstinSchiebel - 29 Nov 2007