Adds line numbers to code on stackoverflow.com

stackoverflow-line-numbers.js

var code_blocks = $("pre > code");
code_blocks.prepend("1\t");
for (var b = 0; b < code_blocks.length;b++) {
	var newlines = $(code_blocks[b]).find("span.pln");
	var c = 1;
	for (var i=0;i < newlines.length;i++) {
		newlines[i].innerHTML =  newlines[i].innerHTML.replace(/(?:\r\n|\r|\n)/g, function(x) {
			return "\n" + ++c + "\t";
		});
	}
}