Applescript for sending selection as new Mail

Question

Hello. What i'm trying to achieve is adding an option to Safari for getting the selected text and sending it to Mail as the content of a new email message, along with the website's url. The already available action "New Mail Message" is able to do half of what i'm asking: it can send my selection to Mail as the content of a new emal message, but nothing more. I'm trying to compose an Applescript to run from within my Automator Service, but i'm getting an error: *The action "Run AppleScript" encountered an error.*
Any ideas?
Here is a screenshot of my Automator Workflow:
http://tinypic.com/r/2qi2xom/3
*And here is the script i'm using:*
on run {input, parameters}
set myBodyText to value of variable "mySelection" of front workflow
set siteURL to value of variable "mySiteURL" of front workflow
tell application "Mail"
make new outgoing message with properties {visible:true, subject:"Something Interesting", content:"" & siteURL & myBodyText}
end tell
return input
end run

Answer 1

Javascript can return the selected text...
tell application "Safari"
tell document 1
set selected_text to do JavaScript "var txt = '';
if (window.getSelection)
    txt = window.getSelection();
else if (document.getSelection)
    txt = document.getSelection();
else if (document.selection)
    txt = document.selection.createRange().text;
else return;
set siteURL to URL
end tell
end tell
tell application "Mail"
activate
make new outgoing message with properties {visible:true, subject:"Something Interesting", content:"" & siteURL & return & return & selected_text}
end tell