Refer to this question:
The solution was perfect, but but the function that put the content from a Div into an email, also put the linebreaks, but only as code: <br>
I guess the function must be changed so that the linebreakes will be real linebreakes, not the <br> tags.
The function is to be read in the case refered to above. but I have also posted it here in the code snippet.
<a onclick="email_foresporsel()"><button>Send forespørsel</button></a>
var subject = "some text";
var body = "";
body = document.getElementById("dinevalgDiv").innerHTML;
document.location.href = 'mailto: firstname.lastname@example.org?subject=' + encodeURIComponent(subject) + '&body=' + body;