I am trying to research using Javascript in  DotNetNuke. Accidentally, I found an article from _http://www.howtodotnetnuke.com/Blog/tabid/54/EntryID/4/Default.aspx. I followed his instructions. The javascript code is put in a js file in the site folder.  Other code is listed below:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
            Try
                ClientAPI.RegisterClientScriptBlock(Me.Page, "tooltipVB_1.js", "<script type='text/javascript' src='/DucMinhNguyen/tooltipVB_1.js'></script>")
                ClientAPI.RegisterStartUpScript(Me.Page, "", "<script type=\'text/javascript\'>document.onmousemove=positiontip</script>")
            Catch exc As Exception        'Module failed to load
                ProcessModuleLoadException(Me, exc)
            End Try
        End Sub

        Protected Sub gvNotes_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles gvNotes.RowDataBound



            'Create pop up tool tip for the user id note field

            If e.Row.RowType = DataControlRowType.DataRow Then

                Dim tip As String = "ddrivetip('This user has a DotNetNuke User ID of: " + DataBinder.Eval(e.Row.DataItem, "UserID").ToString + "','#76a5d3', 250)"

                e.Row.Attributes.Add("onmouseover", tip)

                e.Row.Attributes.Add("onmouseout", "hideddrivetip()")

            End If



        End Sub

However, when I move over the table, there is an error that I read from FireBug. The content of the error is tipobj has no property. Please tell me how to fix it. I am afraid that tipobj is referenced before it is loaded in the page.

Thank in advance.

Thank for your reply. I can display the tooltip. However, there is still a problem. The position of the tooltip is fixed. I am trying to show it in the postion of the cursor. Here is my code:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
            Try
                ClientAPI.RegisterClientScriptBlock(Me.Page, "tooltipVB_1.js", "<script type='text/javascript' src='/DucMinhNguyen/tooltipVB_1.js'></script>")
            Catch exc As Exception        'Module failed to load
                ProcessModuleLoadException(Me, exc)
            End Try
        End Sub

Protected Sub gvNotes_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Handles gvNotes.RowDataBound



            'Create pop up tool tip for the user id note field

            If e.Row.RowType = DataControlRowType.DataRow Then
                Dim tip As String = "ddrivetip('This user has a DotNetNuke User ID of: " + DataBinder.Eval(e.Row.DataItem, "UserID").ToString + "','#99FF00', 250)"
                e.Row.Attributes.Add("onmouseover", tip)
                e.Row.Attributes.Add("onmouseout", "hideddrivetip()")

            End If
        End Sub

I put these code in the bottom of .ascx file.

<div id="dhtmltooltip">abc</div>
<script language="javascript" type="text/javascript">
tipobj1();
document.onmousemove=positiontip;
</script>

And here is .js file.

var offsetxpoint=-60 //Customize x offset of tooltip
var offsetypoint=20 //Customize y offset of tooltip
var ie=document.all
var ns6=document.getElementById && !document.all
var enabletip=false
//if (ie||ns6)
//var tipobj=document.all? document.all["dhtmltooltip"] : document.getElementById? document.getElementById("dhtmltooltip") : ""
var tipobj;


function ietruebody(){
return (document.compatMode && document.compatMode!="BackCompat")? document.documentElement : document.body
}

function ddrivetip(thetext, thecolor, thewidth){
if (ns6||ie){
if (typeof thewidth!="undefined") tipobj.style.width=thewidth+"px"
if (typeof thecolor!="undefined" && thecolor!="") tipobj.style.backgroundColor=thecolor
tipobj.innerHTML=thetext
enabletip=true
return false
}
}

function positiontip(e){
if (enabletip){
var curX=(ns6)?e.pageX : event.clientX+ietruebody().scrollLeft;
var curY=(ns6)?e.pageY : event.clientY+ietruebody().scrollTop;
//Find out how close the mouse is to the corner of the window
var rightedge=ie&&!window.opera? ietruebody().clientWidth-event.clientX-offsetxpoint : window.innerWidth-e.clientX-offsetxpoint-20
var bottomedge=ie&&!window.opera? ietruebody().clientHeight-event.clientY-offsetypoint : window.innerHeight-e.clientY-offsetypoint-20

var leftedge=(offsetxpoint<0)? offsetxpoint*(-1) : -1000

//if the horizontal distance isn't enough to accomodate the width of the context menu
if (rightedge<tipobj.offsetWidth)
//move the horizontal position of the menu to the left by it's width
tipobj.style.left=ie? ietruebody().scrollLeft+event.clientX-tipobj.offsetWidth+"px" : window.pageXOffset+e.clientX-tipobj.offsetWidth+"px"
else if (curX<leftedge)
tipobj.style.left="5px"
else
//position the horizontal position of the menu where the mouse is positioned
tipobj.style.left=curX+offsetxpoint+"px"

//same concept with the vertical position
if (bottomedge<tipobj.offsetHeight)
tipobj.style.top=ie? ietruebody().scrollTop+event.clientY-tipobj.offsetHeight-offsetypoint+"px" : window.pageYOffset+e.clientY-tipobj.offsetHeight-offsetypoint+"px"
else
tipobj.style.top=curY+offsetypoint+"px"
tipobj.style.visibility="visible"
}
}

function hideddrivetip(){
if (ns6||ie){
enabletip=false
tipobj.style.visibility="hidden"
tipobj.style.left="-1000px"
tipobj.style.backgroundColor=''
tipobj.style.width=''
}
}


function tipobj1()
{
    tipobj = document.getElementById("dhtmltooltip");
}

In the function positiontip, there is parameter e. And I don't know how to deal with it.

Thank for your hint. I didn't know that feature in Events module. I will check it out.