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[Javascript] dynamically creating variables using eval()

  • From: javascript@xxxxxxxxxx (Lau)
  • Subject: [Javascript] dynamically creating variables using eval()
  • Date: Thu, 23 Aug 2001 18:06:53 +1000
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innerHTMLHi all,

How can I dynamically create a new javascript variable that will be =
available to subsequent scripts.
I can use eval("var newvar;newvar=3D33;") to create the variable, but =
the new variable only seems to exist within the scope of the script =
block that it was created in. Below is a page that demonstrates what I =
mean... the first alert works, the second one says that newvar is =
undefined.

<html><head></head><body>
<A HREF=3D# onclick=3D'Javascript:eval("var =
newvar;newvar=3D33;");alert(newvar);'>create variable "newvar"</A><BR>
<A HREF=3D# onclick=3D'Javascript:alert("newvar=3D"+newvar);'>view  =
"newvar"</A>
</body></html>

Thanks in advance
Lau

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>innerHTML</TITLE>
<META content=3D"text/html; charset=3Diso-8859-1" =
http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.2614.3500" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Hi all,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>How can I dynamically create a new =
javascript=20
variable that will be available to subsequent scripts.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I can use eval("var =
newvar;newvar=3D33;") to create=20
the variable, but the new variable only seems to exist within the scope =
of the=20
script block that it was created in. Below is a page that demonstrates =
what I=20
mean... the first alert works, the second one says that newvar is=20
undefined.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial=20
size=3D2>&lt;html&gt;&lt;head&gt;&lt;/head&gt;&lt;body&gt;<BR>&lt;A =
HREF=3D#=20
onclick=3D'Javascript:eval("var =
newvar;newvar=3D33;");alert(newvar);'&gt;create=20
variable "newvar"&lt;/A&gt;&lt;BR&gt;<BR>&lt;A HREF=3D#=20
onclick=3D'Javascript:alert("newvar=3D"+newvar);'&gt;view&nbsp;=20
"newvar"&lt;/A&gt;<BR>&lt;/body&gt;&lt;/html&gt;</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Thanks in advance</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Lau</FONT></DIV></BODY></HTML>

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