Strings - Get The Coordinates From A Variable In The URL

Oct 2, 2011

I have this code for HMTL5 Canvas, however this is a JavaScript directed question not a Canvas question.

<script type="text/javascript">
var c=document.getElementById("myCanvas");
var cxt=c.getContext("2d");
cxt.moveTo(0,400);
cxt.lineTo(50,a);
cxt.lineTo(100,b);
cxt.lineTo(150,390);
[Code]...

That will draw a line graph, however I want to get the coordinates from a variable in the URL. So it may be example.com/a=500&b=600 . How would I retrieve these two variables and then insert in to they're respective places?

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[Code]...

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[Code]...

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Demonstration code:

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Code:

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[Code]....

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[Code]...

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Nov 23, 2005

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[Code]....

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I've been having an issue with Safari when it comes to getting mouse coordinates after clicking on an element - specifically the Y coordinate. For some reason, the 0 position is the bottom left corner of the window. The further down the page, the lower the number gets. This is crazy behavior - I have this stupid thing working in every other browser, but Safari.

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My test HTML is like so:

<br><br><br><br><br><br><br><br>
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<br><br><br><br><br><br><br><br>
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[Code].....

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