Special Characters NOT displaying properly in javascript MAILTO

I have a Javascript mailto function embedded in my web page, whose encoding is set to UTF-8. So the special characters such as characters showing French accent and Chinese characters show up fine on the web page.

However, when I try to use the maito function, the subject and body having these French and Chinese characters get distorted in Outlook

Please see code below. How do I fix this?

mailto function:
 
function sendEmaill() {
	    window.location.href="mailto:?subject=Votre ami vous a invité à consulter un lien sur le site Web Google&body=On vous a invité à consulter un lien du site Web Google, www.google.com. Cliquez sur le lien ci-dessous pour afficher la page :%0A%0D" + escape(window.document.location);
	}
 
 
calling code:
 
Send to friend: <a href="javascript:sendEmail()">Send a friend</a>

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mailto-screenshot.doc