IE7 (and IE6) incompatability

[vburzynski]

I've been attempting to get jsPDF to work in as many versions of Internet Explorer as I could. I was able to get jsPDF to work in IE9 using the Downloadify example. IE8 was also easy enough as I just need to provide a polyfill for Array.prototype.indexOf. I hit a wall with IE7, however:

There are several points in the code where it tries to access the character in a string by index using the notation str[0]. However to my knowledge, IE7 doesn't support this and requires the use of str.charAt(0). I noticed this specifically in the uncompress function, but there may be additional portions of code that use this.

[diegocr]

Thanks for providing your findings, it smells to me like the problem with IE6/7 would be more than just that, though.

In any case, we have #180 for further IE-related details.