add_filter('admin_head','myplugin_tinymce');
 
function myplugin_tinymce() {
    wp_admin_css('thickbox');
    wp_print_scripts('jquery-ui-core');
    wp_print_scripts('jquery-ui-tabs');
    wp_print_scripts('post');
    wp_print_scripts('editor');
    add_thickbox();
    wp_print_scripts('media-upload');
    if (function_exists('wp_tiny_mce')) { wp_tiny_mce(); }
}

the_editor($content_to_load);

function str_replace(search, replace, string) {
	while(string.indexOf(search) != -1) {
		var array = string.split(search);
		string = array.join(replace);
	}
	return string;
}
 
// Example
var str = 'testing\r\nthis';
trace(str);
 
var newString = str;
newString = str_replace("\r", '', newString);
newString = str_replace("\n", ' ', newString);
 
trace(newString);