Create interactive chart feature for website using google chart tools or similar

Hi

Looking to add an interactive chart feature on my website that allows users to compare several different assets over a period of time.

There would be roughly 40 assets to choose from with the data being indexed

Would like them to select say a maximum of 5 otherwise the chart looks to messy

Would like the user to have the ability to print the chart onto a letterhead template in pdf format

We currently produce this data manually using excel and then copying the chart to work, printing/pdf and then posting/emailing it to clients.

Examples of this type of feature are:

http://uk.finance.yahoo.com/echarts?s=^FTSE#symbol=%5Eftse;range=1d;compare=;indicator=volume;charttype=area;crosshair=on;ohlcvalues=0;logscale=off;source=;

http://www.google.com/finance?q=INDEXDJX:.DJI,INDEXSP:.INX,INDEXNASDAQ:.IXIC

Want to get the job done quickly due to new site going live on Monday

Hope you can get envolved

Thanks