DBF Exchange Bookmarklet

/*
DBF EXCHANGE WEEK PERCENT CHANGE IN STOCK PRICE EXTRACTOR AND CALCULATOR

This is the content of a bookmarklet that will see if you are on the correct
page for stock retrieval, and either extracts two closing prices and determines
the week's percent change if you're on the correct page, or redirects you to the
correct page for the weekly stock prices of the market and company of your
choice.  For an unknown reason, the bookmarklet cannot both redirect you and
extract closing price data despite being coded to do both.

To use it, create a new bookmark, copy the code below into the "location" field
of the bookmark, and then click that bookmark whenever you want to get the
week's percent change of closing price from the Google Finance site.
*/

javascript:var%20defaultExchange%20=%20"NYSE:LMT";%20var%20prevCloseString%20=%20"Last%20week's%20closing%20price%20is:%20%20";%20var%20nextCloseString%20=%20"This%20week's%20closing%20price%20is:%20%20";%20var%20changeString%20=%20"Percent%20change:%20%20";%20var%20resultString;%20var%20priceDiv;%20var%20priceTable;%20var%20prevClose,%20nextClose;%20var%20change,%20percentChange;%20%20function%20getPrices()%20{%20priceDiv%20=%20document.getElementById("prices");%20priceTable%20=%20priceDiv.childNodes[1];%20%20prevClose%20=%20priceTable.rows[2].cells[4].innerHTML;%20nextClose%20=%20priceTable.rows[1].cells[4].innerHTML;%20change%20=%20(nextClose%20-%20prevClose)%20/%20prevClose;%20percentChange%20=%20100%20*%20change;%20%20resultString%20=%20percentChange.toFixed(2);%20%20alert(prevCloseString%20+%20prevClose%20+%20"\n"%20+%20nextCloseString%20+%20nextClose%20+%20"\n\n"%20+%20changeString%20+%20resultString);%20}%20%20if(window.location.hostname%20!=%20"www.google.com"%20||%20window.location.pathname%20!=%20"/finance/historical")%20{%20var%20exchange%20=%20prompt("Are%20you%20sure%20you're%20on%20the%20right%20page?\nType%20your%20desired%20market%20and%20company:%20",%20defaultExchange);%20window.location.assign("http://www.google.com/finance/historical?q="%20+%20exchange%20+%20"&histperiod=weekly&num=2");%20}%20%20getPrices();