Hi,
I'm having trouble with the statement
SelectedTD = this
in the ClickTD function in the following code.
The code does the following:
the function InitTable() puts a table in the web page that has one row and one cell with an onclick handler attached to the cell .
The onclick handler (ClickTD) is supposed to do one thing when the cell in the table is clicked on, if the variable SelectedTD is equal to the object "this", and another if not. This statement does not seem to be working in IE while it does in Netscape. In IE I get an error message on the line following saying that "SelectedTD.style is null or not an object."
Can anybody explain why? How do I do what I'm trying to do in IE?
Sorry if this post is long.
Thanks,
Dave
------------------------------------------
[HTML]<HTML>
<BODY>
<SCRIPT>
var NewTABLE
var SelectedTD = null
function InitTable() {
NewTABLE = document.createElement("TABLE")
var NewTBODY = document.createElement("TBODY")
var NewTR = document.createElement("TR")
var NewTD = document.createElement("TD")
var NewTEXT = document.createTextNode("This is the contents of the cell ")
NewTD.attachEvent("onclick",ClickTD)
NewTD.style.setAttribute("cssText","color:blue",0)
NewTD.appendChild(NewTEXT)
NewTR.appendChild(NewTD)
NewTBODY.appendChild(NewTR)
NewTABLE.appendChild(NewTBODY)
document.body.appendChild(NewTABLE)
NewTABLE.setAttribute("border","3")
}
function ClickTD() {
alert("in ClickTD")
if (SelectedTD != this) {
SelectedTD = this // this statement does not work
SelectedTD.style.setAttribute("cssText","color:pur ple",0) // this statement gives an error message
}
else {
SelectedTD.style.setAttribute("cssText","color:blu e",0)
SelectedTD = null
}
}
InitTable()
</SCRIPT>
</BODY>
</HTML>[/HTML]
3  989 
Hi,
Note that in my previous post the problem statement is not the if statement "If (SelectedTD != this)" in the ClickTD function, but rather the two statements immediately following the if statement that are supposed to be executed when the condition is true.
Sorry for the confusion.
Thanks again for the help.
Dave
Note that in my previous post the problem statement is not the if statement "If (SelectedTD != this)" in the ClickTD function, but rather the two statements immediately following the if statement that are supposed to be executed when the condition is true.
Since 'Netscape' doesn't support attachEvent, it's hard to see how your code could work with it.
When you use attachEvent, this does not point to the element. Unless the cell is going to be assigned an additional handler, just assign the handler directly:
Hi,
Thanks very much, that worked.
I don't fully understand why yet, but I think I'll get it..
The same code that I posted does work in Netscape if you replace the attachEvent function with the addEventListener function, and if you replace SelectedTD.style.setAttribute("cssText","color:pur ple",0) with "SelectedTD.setAttribute("style","color:purple ").
I included only the IE specific statements in the test code that I posted--sorry for not indicating this.
Thanks again,
Dave
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