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

Rui Fortes RuiFortes at clix.pt
Sun Apr 22 11:09:42 CDT 2001

```Thanks a lot for the Help.
Actually I managed to solve it and I'm sorry I didn't post this.
I just used eval("0xff").
Here the code I used:

function gethicolor(colorstr)
{

red = eval("0x" + colorstr.slice(1,3));
green = eval("0x" + colorstr.slice(3,5));
blue = eval("0x" + colorstr.slice(5,7));

red = red + 50;
green = green + 50;
blue = blue + 50;

if(red > 255)red = 255;
if(green > 255)green = 255;
if(blue > 255)blue = 255;

return ((red * 65536) + (green * 256) + blue);
}

Just adding a fixed value to color components doens't result in a good highlight but...

Thank's again.
Bye.
----- Original Message -----
From: Peter Brunone
To: javascript at LaTech.edu
Sent: Friday, April 20, 2001 6:10 PM
Subject: Re: [Javascript] How do I convert "FF" to 255?

According to the Netscape JavaScript reference, you can use escape(var) to get the hexadecimal value, and unescape(var) to get the decimal value.

----- Original Message -----
From: Rui Fortes
To: javascript at LaTech.edu
Sent: Friday, April 20, 2001 11:23 AM
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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