Hello everyone,
This question is often asked, and I know there are lots and lots of answers that I could be using, but I just want a clear good answer.
I am making a website (for playing a game called Go).
It has a page for each game of course.
I'm making the website in PHP and MySQL, I know that for 'real-time' games another solution would probably be better, but I'm learning to master php and MySQL.
The game is shown via the <canvas> tag (using php and mysql to write the javascript, with in its turn writes the <canvas>).
Now it can happen that the game develops in one browser, but the old game board is still shown in the other.
I want to solve this issue using AJAX page refreshing.
I think it's possible to refresh the game every like 10/20/30 seconds, without the page reloading, so the page also doesn't go back to the top every refresh, but stays at it's scroll position.
The clearest answer to my problem i found here:
http://aleembawany.com/2005/09/01/ajax-instant-tutorial/
...now all I really have to do is add an automatic timer, so the div containing the game board automatically refreshes.
...Could someone help me, pretty much step by step? ( I may know a bit about html/php/mysql/css/design and stuff, but I REALLY REALLY suck with javascript. My javascript is usually just copy/paste work... )
Cheers!
Kelley van Evert
4  5272 
Well, you see:
I'm using a javascript function in the <head>, to write to the <canvas> tag.
The tutorial I link to, see above, uses getElementById, but <script> doens't support an id (I think?).
...so how do I reload the data into the head?
This is a part of the <head>, and <body>: -
<?php
-
// displayPageType_game -> 475
-
// this is where the javascript is loaded that writes to the <canvas> tag...
-
$canvasId = "gameBoard";
-
$canvasSize = 475;
-
$dotSize = 3;
-
$lineSize = 1;
-
$lineColor = "#bbbbbb";
-
$radiusPixAdjust = -1;
-
$extraBorder = 1;
-
displayBoard($gameid, $canvasSize, $canvasId, $dotSize, $lineSize, $lineColor, $radiusPixAdjust, $extraBorder);
-
?>
-
</head>
-
<body onLoad="canvasDraw();">
-
... and here is the canvas: -
<canvas id="<?php echo $canvasId;?>" width="<?php echo $canvasSize;?>" height="<?php echo $canvasSize;?>">
-
You are using a browser that doesn't support the <canvas> tag.
-
</canvas>
-
acoder 16,027
Recognized Expert Moderator MVP
A script tag can have an ID. There's no JavaScript in the code that you posted above. Post that too.
Note: If you set the src of a script tag, it will execute the code within the source file.
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