var sSubject = 'Interesting Web Page';
var sBody    = 'Hi,\n\nThis web page might be of interest to you:\n\n' + location.href;
var sDisplay = 'Email this page';

function write_mailto() {
    document.write(
        '<a href="mailto:'
        + '?subject=' + escape(sSubject)
        + '&body=' + escape(sBody)
        + '" class="email">' + sDisplay + '</a>'
        ); 
}