# [Javascript] How do I convert "FF" to 255?

Filipiak, Bob (Contractor) filipiab at atsc.army.mil
Fri Apr 20 13:19:58 CDT 2001

```Modify this:

<<HTML>
<<HEAD>
<<TITLE>Numbers Conversion Table</TITLE>
<</HEAD>

<<BODY>
<<B>Using toString() to convert to other number bases:</B>
<TABLE border=1>
<<TR>
<<TH>Decimal</TH>
<<TH>Hexadecimal</TH>
<<TH>Binary</TH>
<</TR>
<<SCRIPT language="JavaScript">
<<!--
var content = "";
var i = 0;
for (i = 0; i <= 255; i++){
content = "<TR>";
content = content + "<TD>" + i.toString(10) + "</TD>";
content = content + "<TD>" + i.toString(16) + "</TD>";
content = content + "<TD>" + i.toString(2) + "</TD></TR>";
document.write(content)
}

<file://--/> //-->
<</SCRIPT>
<<TR><TD>&nbsp;</TD><TD>&nbsp;</TD><TD>&nbsp;</TD></TR>
<</TABLE>
<</BODY>
<</HTML>

Bob Filipiak (Contractor)
MCP

-----Original Message-----
From: Rui Fortes [mailto:RuiFortes at clix.pt]
Sent: Friday, April 20, 2001 12:23 PM
To: javascript at LaTech.edu
Subject: [Javascript] How do I convert "FF" to 255?

Hello.

How can I get an highlighted version of a color.
That is, how can I find the code of a color wich is a lighter version of
another color.
I tryed to do this myself but I need, for instance, to know how to get a
number from a string representing an hexadecimal number.
I could then add some value to RGB components and use RGB(newred, newgreen,
newblue) to get that color.
I found Hex function that returns a string representing the hexadecimal
convertion of a number.
Is there an inverse function to turn a string into a number?
Something like afunc("FF") that returns 255.

Thanks

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