September 2006
Monthly Archive
Javascript - check/uncheck all form checkboxes
After searching around the net looking for an example snippet of javascript that would check or uncheck all of a series of checkboxes on a form... the results from Google were good, however each 'example' assumed that you I actually had a good understanding of what you were reading or that you I might actually read it instead of just pasting the pieces you liked in... Obviously I did the latter and after 20 minutes of pounding my head on the keyboard figured out what I was doing wrong...
So for all of you code slammers, this one is for you.
CODE:
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<script language="JavaScript">
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function checkall()
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{
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for(i=0; i<document .FormName.elements.length; i++)
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{
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if(document.FormName.elements[i].type=="checkbox")
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{
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document.FormName.elements[i].checked=true;
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}
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}
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}
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function uncheckall()
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{
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for(i=0; i<document.FormName.elements.length; i++)
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{
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if(document.FormName.elements[i].type=="checkbox")
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{
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document.FormName.elements[i].checked=false;
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}
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}
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}
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</script>
Simple enough, look through each form element and either mark them checked or unchecked depending on the function being called.
And of course in your markup
CODE:
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<a href=
"javascript: void(0);" onclick=
"javascript: checkall();">Check All</a> / <a href=
"javascript: void(0);" onclick=
"javascript: uncheckall();">Uncheck All</a>
And now where I went wrong. If you actually read the JavaScript you'll see the lines
document.FormName.elements.....
Well, FormName must be specified! Look at your markup where
CODE:
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<form name="get_form_data" method="POST" action="....... blah blah blah
if you change the javascript lines to read
document.get_form_data.elements.....
Life will be bliss and you can click check and uncheck all afternoon long and watch the little checkmarks magically appear and disappear from your forms. Providing you with some entertainment while waiting for the impression of the keypad to subside from your forehead.
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Geeky Stuff12 Sep 2006 09:52 am
Shell script Conditional
The need for conditionals in shell scripts have the ability to make life easier, be it from just a quick script or setting up environment variables for logins.
In the example below taken from a login script we needed to verify if a particular directory exists and if so set enviroment variables in a particular fashion to later be added to the $PATH, if not then set them another way. This in particular (though slightly sanitized) is part of a larger script used to determine what OS the server is running Solaris or HPUX, the particular function of the server can be termined if a certain directory exists.
CODE:
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if [ -d /apphome/$LOGNAME/serv/prcs/$LOGNAME ]
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then
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export APPCONFIG=/apphome/$LOGNAME/serv/prcs/$LOGNAME/APPCFG
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else
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export APPCONFIG=/apphome/$LOGNAME/serv/$LOGNAME/APPCFG
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fi
This list gives the file handling tests available.
-r True if file exists and is readable
-w True if file exists and is writable
-x True if file exists and is executable
-f True if file exists and is a regular file
-d True if file exists and is a directory
-c True if file exists and is a character special file
-b True if file exists and is a block special file
-p True if file exists and is a named pipe (FIFO)
-u True if file exists and is a SETUID file
-g True if file exists and is a SETGID file
-k True if file exists and the sticky bit is set
-s True if file exists and has a size greater than zero
From here this rest is up to your creativity how to employ these checks, using standardized scripts across all hosts just makes life easier.
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Blogging Resources01 Sep 2006 12:37 pm
Monthly income for outbound links
I saw this advert on another site and decided to give it a shot... afterall what could it hurt?
My results... signed up and was approved in a day, and within 3 weeks earned my first paid link! Granted no tremendous windfall, but hey someone willing to pay me $25 a month per link just to have a text link on one of my PR5 blogs? In a month my domain registration and annual hosting fees are paid??!!?? Now the rest of the year it puts a little extra jingle in my pocket each month. It obviously won't earn you a shiny new car, but an extra $100 a month in your pocket for a snippet of PHP code and a few outbound links seems to be pretty fair to me.
Time to start sprucing up a few more site and submit them now that my doubts have been lifted.
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