Due to different implementations of W3C recommendations, some browsers, e.g. Internet Explorer 8, require additional steps to display the desired charts.
For IE 8 you have two options and this page covers both of them. According to your requirements you should adopt one of these options.
To trigger the quirks mode you can either drop the doctype declaration completely or choose the transitional doctype. The transitional doctype looks like this.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <!-- ... --> </html>
Neither option can be recommended! We strongly advise you to choose the IE 7 compatibility mode as explained in the following section. If you want additional information as to why we recommend this, please read the Wikipedia page on quirks mode and this website. More information about doctype can also be found in Wikipedia.
This preferred option requires you to add the following meta tag to your HTML page head.
<!-- ... --> <html> <head> <!-- ... --> <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" /> <!-- ... --> </head> <!-- ... --> </html>
Again, this Wikipedia page will provide you with additional information about this specific meta tag.