DaniWeb IT Discussion Community - IE7 document.getElementById problem

Hi,

I would like to make a blok of text appear when the user clicks a hyperlink. Therefor I created a test file in html:

<html>

 <head>

  <title>InnerHTML - Test</title>        

  <meta http-equiv="content-type" content="text/html;charset=UTF-8" />

 

 <script type="text/javascript">

  function writeEvent(txt){

   document.getElementById("infoOut").innerHTML = makeEvent(txt);

  }



  function makeEvent(text){

   var output 

   return "<table style='border:solid 1px red'><tr><td>"+text+"</td></tr></table>";

  }

 </script>



 </head>

 <body>

 <p>

  <a href="#" onclick="writeEvent('<b>Partijbestuur</b><br/>Te rode roos,<br/>Om: 19u30')">dag 1</a><br/>



  <a href="#" onclick="writeEvent('<b>Kaartavond</b><br/>Te rode roos,<br/>Om: 19u30<br/>Inschijven: <a href=http://www.google.be>Hier</a>')">dag 2</a><br/>



  <a href="#" onclick="writeEvent('<b>YO 2008</b><br/>Afspraak om 18:23 aan de kerk in hofstade<br/>tickets in voorverkoop bij hilde te krijgen')">dag 3</a><br/> 

 </p>



 <p id="infoOut"></p>

 </body>

</html>

Which works fine in bouth Firefox and IE7. So I placed the code form the test file above into my php code. This php shows a calendar and highlights special dates.
Here are pieces that are the most impotand for this probem:

// Add an event                                                                 

        public function addEvent($eventTitle, $eventDay, $eventMonth, $eventYear, $eventInfo) {

                $this->events[$eventYear][$eventMonth][$eventDay] = array('event_title' => $eventTitle, 'event_link' => '#', 'event_info' => $eventInfo);

// Set day as either plain text or event link

                        if (isset($this->events[$this->year][$this->month][$this->day]))

                                $this->htmlDay = sprintf("<a href=\"%s\" title=\"%s\" onClick=\"writeEvent('%s')\">%s</a>", $this->events[$this->year][$this->month][$this->day]['event_link'], $this->events[$this->year][$this->month][$this->day]['event_title'], $this->events[$this->year][$this->month][$this->day]['event_info'], $this->day);

                        else

                                $this->htmlDay = $this->day;

This code was also tested before I added the onclick() event that shoud trigger the JS function to show the block of text.

Now I have this page that holds the calendar, the special days and the javascript

// JavaScript

$javascript = <<< EOT



<script type="text/javascript">

function writeEvent(t1){

 document.getElementById("infoOut").innerHTML = makeEvent(t1);

}



function makeEvent(t2){

 return "<center><table style='border:solid 1px red'; margin=3px; width=435px;><tr><td>"+t2+"</td></tr></table></center>";

}

</script>



EOT;

echo $javascript;



// Include calendar class

require_once('calendar.class.new.php');



// Create calendar object

$cal = new calendar;



// Turn on navigation links

$cal->enableNavigation();



// Add event on current day

$cal->addEvent('YO 2008', 4, 1, 2008, 'YO 2008<br>test test om 18u30 wees op tijd!');

$cal->addEvent('Patrijbestuur', 9, 1, 2008, 'http://www.example-event.com');

$cal->addEvent('Nieuwjaarsreceptie regio s Vilvoorde en Zaventem', 11, 1, 2008, 'http://www.example-event.com');





// Display calendar centered

echo("<center>");

$cal->display($_GET['month'], $_GET['year']);

echo("</center><br/>");



// Output of event

echo("<p id=\"infoOut\"></p>");

This does as it is supposed to do in firefox BUT in IE7 it does not.
when I click a special day in IE7 it does not show any blok of text and gives me the following error:
"error: unkown runtime error"

that points to the 3e line of this code:

<script type="text/javascript">

function writeEvent(t1){

 document.getElementById("infoOut").innerHTML = makeEvent(t1);

}

This is realy wierd to me there is nothing wrong with this:
document.getElementById("infoOut").innerHTML = makeEvent(t1);

Please can anyone tell me how to solve this? Or tel me where I can find some sort of solution/explenation.

AbberLine