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code error...a simple javascript problem...urgent**

Posted on 2004-08-30
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Medium Priority
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355 Views
Last Modified: 2010-04-06
Hi,
This code works great for tooltip. but the only problem is...if the strHTM is not defined in the tooltip then it says undefined in the tooltip... how to avoid that? for example...if my code says <a href="#" onMouseover="tooltip(welcome);">welcome</a> then it works gr8...if i am saying <a href="#" onMouseover="tooltip();">welcome</a> then it says undefined...i need a logic to validate that....urgent please.


<html>
<head>
<script>
var oPopup = window.createPopup();
function tooltip(strHTML, oNavigate)
{      
      oPopup.hide();
      oPopup.document.navigateTo = oNavigate;
      oPopup.document.desiredX = event.screenX+12;
      oPopup.document.desiredY = event.screenY+12;    
      if(strHTML!=""){
            oPopup.document.body.innerHTML = '<table style=\'background:#ffffcc; border:1px solid black; padding:4px; font-family:tahoma; font-size:10px; width:100%;filter:progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=white, EndColorStr=yellowgreen)\' ><tr><td><table style=\'background:#ffffcc; border:1px solid yellowgreen; padding:4px; font-family:tahoma; font-size:10px; width:100%;filter:progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=yellowgreen, EndColorStr=white)\' ><tr><td>' + strHTML + '</td></tr></table></td></tr></table>';
      }
      oPopup.document.timerID = setTimeout("showtooltip()", 500);
}
function showtooltip()
{
      // This popup is temporary and is used only to detect what height the popup should be displayed. This is important because the
      // popup size will vary between definition text lengths.
      var popupBody = oPopup.document.body;
      oPopup.show(0,0,0,0);
      var realHeight = popupBody.scrollHeight;
      var realWidth = popupBody.scrollWidth;
      //hide the dimension detector popup.
      oPopup.hide();
      //Show the actual popup with correct width and height.
      oPopup.show(oPopup.document.desiredX, oPopup.document.desiredY,realWidth, realHeight);      
}
function hidetooltip()
{
      oPopup.hide();
      // cancel delayed display of tooltip
      if (oPopup.document.timerID)
      {
            clearTimeout(oPopup.document.timerID);
            oPopup.document.timerID = 0;
      }
}
</script>
</head>
<BODY>
<a href="#" onMouseOver="tooltip()">Welcome</a>
</body>
</html>
0
Comment
Question by:SubhaBabu
  • 5
  • 4
9 Comments
 
LVL 13

Expert Comment

by:StormyWaters
ID: 11933637
Change:
 if(strHTML!=""){
to:
 if(strHTML!=null){

and it won't show a tooltip at all if no text is specified.
You could also make it show some default text by changing the tooltip() function to:

function tooltip(strHTML, oNavigate)
{    
     oPopup.hide();
     oPopup.document.navigateTo = oNavigate;
     oPopup.document.desiredX = event.screenX+12;
     oPopup.document.desiredY = event.screenY+12;    
     if(strHTML==null) {
       strHTML = "Your default message";
     }
          oPopup.document.body.innerHTML = '<table style=\'background:#ffffcc; border:1px solid black; padding:4px; font-family:tahoma; font-size:10px; width:100%;filter:progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=white, EndColorStr=yellowgreen)\' ><tr><td><table style=\'background:#ffffcc; border:1px solid yellowgreen; padding:4px; font-family:tahoma; font-size:10px; width:100%;filter:progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=yellowgreen, EndColorStr=white)\' ><tr><td>' + strHTML + '</td></tr></table></td></tr></table>';
     oPopup.document.timerID = setTimeout("showtooltip()", 500);
}


0
 
LVL 2

Author Comment

by:SubhaBabu
ID: 11933846
Thanks for your immediate reply....your solution works...if it has only one link ....if i add like

<a href="#" onMouseOver="tooltip()">Welcome</a> <a href="#" onMouseOver="tooltip('you there')">Welcome</a>

this...it shows "you there" for both the links
0
 
LVL 2

Author Comment

by:SubhaBabu
ID: 11933857
And i do not want to give a default message, since i am gonna use this in too many places...
0
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LVL 13

Expert Comment

by:StormyWaters
ID: 11933883
That doesn't happen for me. IE, obviously, because this doesn't work anywhere else. Version 6.0. What version are you looking at?
0
 
LVL 2

Author Comment

by:SubhaBabu
ID: 11933903
i want it to work only in IE 6....
0
 
LVL 13

Expert Comment

by:StormyWaters
ID: 11933915
Oh, wait, yes it does. Will look.
0
 
LVL 13

Accepted Solution

by:
StormyWaters earned 1000 total points
ID: 11934048
function tooltip(strHTML, oNavigate)
{    
     oPopup.hide();
       oPopup.document.body.innerHTML = '';
     oPopup.document.navigateTo = oNavigate;
     oPopup.document.desiredX = event.screenX+12;
     oPopup.document.desiredY = event.screenY+12;    
     if(strHTML!=null){
          oPopup.document.body.innerHTML = '<table style=\'background:#ffffcc; border:1px solid black; padding:4px; font-family:tahoma; font-size:10px; width:100%;filter:progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=white, EndColorStr=yellowgreen)\' ><tr><td><table style=\'background:#ffffcc; border:1px solid yellowgreen; padding:4px; font-family:tahoma; font-size:10px; width:100%;filter:progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=yellowgreen, EndColorStr=white)\' ><tr><td>' + strHTML + '</td></tr></table></td></tr></table>';
       }
      
     oPopup.document.timerID = setTimeout("showtooltip()", 500);
}
0
 
LVL 2

Author Comment

by:SubhaBabu
ID: 11934426
Hi there...

Its still has the problem....
0
 
LVL 13

Expert Comment

by:StormyWaters
ID: 11934459
Okay... I have no idea then. Because it works fine for me.
0

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