I have a system that I want to try, which requires me, from an aspx
page, to call a generic function to work perform one task, then i want
to call another function with the results of that task.
something like this:
in my aspx page:
<input type=button onClick="doFirs tFunction('seco ndFunctionName' );">
then in my .js file:
var functionToCall = '';
function doFirstFunction (functionName) {
functionToCall = functionName
// do the initial, common task
sResult = xmlHttp.respons eText
//now call the second function, passing sResult to it
}
Right now I'm using 'switch' and manually adding possible values for
'functionName' then directing manually, but I'd like to make
"doFirstFunctio n" self-maintaining, i.e. without having to update it if
I add more 'second' functions later.
I thought I could use
eval('functionT oCall('+sResult +')');
but this doesn't work so far.
any ideas?
17  8576 
Kevin Blount wrote: I have a system that I want to try, which requires me, from an aspx
page, to call a generic function to work perform one task, then i want
to call another function with the results of that task.
something like this:
in my aspx page:
<input type=button onClick="doFirs tFunction('seco ndFunctionName' );">
Remove apos' and it will become ready to use function reference
(presuming that the secondFunctionN ame exists at the moment of click:
<input type="button" onclick="firstF unction(secondF unction);">
....
function firstFunction(p tr) {
// do stuff
ptr();
}
Alternatively (if you prefer handle strings) all existing functions are
tunelled through the window object, so:
<input type="button" onclick="firstF unction('second Function');">
....
function firstFunction(s tr) {
// do stuff
window[str]();
}
VK said the following on 4/21/2006 4:22 PM: Kevin Blount wrote: I have a system that I want to try, which requires me, from an aspx
page, to call a generic function to work perform one task, then i want
to call another function with the results of that task.
something like this:
in my aspx page:
<input type=button onClick="doFirs tFunction('seco ndFunctionName' );">
Remove apos' and it will become ready to use function reference
(presuming that the secondFunctionN ame exists at the moment of click:
<input type="button" onclick="firstF unction(secondF unction);">
....
function firstFunction(p tr) {
// do stuff
ptr();
}
ptr is undefined unless that is the name of the function.
Alternatively (if you prefer handle strings) all existing functions are
tunelled through the window object, so:
<input type="button" onclick="firstF unction('second Function');">
....
function firstFunction(s tr) {
// do stuff
window[str]();
}
That is the only way to do it that you have mentioned. And the apos'
have to be on the initial function call.
--
Randy
comp.lang.javas cript FAQ - http://jibbering.com/faq & newsgroup weekly
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/
Randy Webb wrote: function firstFunction(p tr) {
// do stuff
ptr();
}
ptr is undefined unless that is the name of the function.
Are you positive about it? ;-)
<html>
<head>
<title>F2F</title>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<script type="text/javascript">
function f1(ptr) {
alert('f1');
ptr();
}
function f2() {
alert('f2');
}
</script>
</head>
<body>
<p style="cursor:p ointer; color:#0000FF; text-decoration:unde rline"
onClick="f1(f2) ;">Click me</p>
</body>
</html>
Randy Webb wrote: <input type="button" onclick="firstF unction('second Function');">
....
function firstFunction(s tr) {
// do stuff
window[str](); <============== =====
}
That is the only way to do it that you have mentioned. And the apos'
have to be on the initial function call.
Could you please explain how this works? It seems like the answer to my
query (indirect function calls) but I don't see how that works.
Are entities (objects, whatever you call them) all elements in a window
array? (Sorry if this is newb Q; I am fairly new to javascript...)
--Yan
Captain Dondo wrote: Are entities (objects, whatever you call them) all elements in a window
array? (Sorry if this is newb Q; I am fairly new to javascript...)
They are "accessible as named properties of the window object" (I hope
that this diplomatic answer covers both IE and non IE situations wich
are rather different).
At the same time they are not enumerable.
The above means that having a conventional HTML page and function
called myFunction, you can call it in the conventional way:
myFunction();
and in the alternate way:
window["myFunction "]();
VK wrote: Alternatively (if you prefer handle strings) all existing functions are
tunelled through the window object, so:
<input type="button" onclick="firstF unction('second Function');">
...
function firstFunction(s tr) {
// do stuff
window[str]();
}
Better:
// in global context
var _global = this;
function firstFunction(s tr)
{
// do stuff
_global[str]();
}
Both approaches require that secondFunction( ) is declared in global context,
of course.
PointedEars
VK wrote: Captain Dondo wrote:
Are entities (objects, whatever you call them) all elements in a window
array? (Sorry if this is newb Q; I am fairly new to javascript...)
They are "accessible as named properties of the window object" (I hope
that this diplomatic answer covers both IE and non IE situations wich
are rather different).
At the same time they are not enumerable.
The above means that having a conventional HTML page and function
called myFunction, you can call it in the conventional way:
myFunction();
and in the alternate way:
window["myFunction "]();
OK< that sounds like what I need.... How do I test for existence of
such an entity?
if(window["myFunction ']) window["myFunction "](a,b,c);
??
VK wrote: Captain Dondo wrote: Are entities (objects, whatever you call them) all elements in a window
array? (Sorry if this is newb Q; I am fairly new to javascript...)
They are "accessible as named properties of the window object" (I hope
that this diplomatic answer covers both IE and non IE situations wich
are rather different).
It covers /only/ the _HTML environment_ in _known_ _graphical_
_Web browsers_, which is its major flaw.
At the same time they are not enumerable.
In the IE AOM.
The above means that having a conventional HTML page and function
called myFunction, you can call it in the conventional way:
myFunction();
and in the alternate way:
window["myFunction "]();
See news:35******** ********@Pointe dEars.de
PointedEars
Thomas 'PointedEars' Lahn wrote: VK wrote: They are "accessible as named properties of the window object" (I hope
that this diplomatic answer covers both IE and non IE situations wich
are rather different).
It covers /only/ the _HTML environment_ in _known_ _graphical_
_Web browsers_, which is its major flaw.
The statement "window host object and Global object are the same"
covers only non-IE based browsers. The statement "Global object
tunells/peers its members through the window host object" covers
IE-based browsers. Both segments are too big to neglect, so an
"abstracted " yet correct explanation is better IMHO if it's not the
main question of the topic.
<offtopic>
Concerning some beloved spooky cases "Global object is here, but window
host is not": no one of them unfortunately is qualified to be taken
seriously.
Adobe SVG Viewer or Corel SVG Viewer are ancient and proprietary
plugins which are not more of anyone's concerns than say some
FoobarPlugin 0.01 behavior. Whatever happens where - it happens, and
thanks God if you come out alive :-)
And missing window host in a XSLT transformed page or a SVG page is not
a feature of the relevant formats, but a strong sign of a clueless
design. It just shows that the author still did not get that in XML the
used *parts* are not anyhow equal to the *resulted document*. In the
particular she may missed to tell in .xsl layout something like:
<xsl:output
method='html'
media-type='text/html'
version='4.01'
doctype-public='-//W3C//DTD HTML 4.01 Strict//EN'
doctype-system='http://www.w3.org/TR/html401/strict.dtd'
encoding='ISO-8859-1'
indent='no'/>
And again in this case no one is more responsible for the script
behavior than say in case of not closed properly <script> tag.
</offtopic> At the same time they are not enumerable.
In the IE AOM.
As a reflection of Global/window differences in IE I started this post
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