TinyMCE Installation

im trying to install tinymce but for some reason i can not get it.
and i see where there is a link that says disable rich text under my text areas but i dont see the tinymce show

here is the javascript from the source of my node/add/page page

-->

tinyMCE.init({
mode : "exact",
theme : "advanced",
relative_urls : false,
document_base_url : "/pragati/",
language : "en",
safari_warning : false,
entity_encoding : "raw",
verify_html : false,
preformatted : false,
convert_fonts_to_spans : true,
remove_linebreaks : false,
apply_source_formatting : true,
theme_advanced_resize_horizontal : false,
theme_advanced_resizing_use_cookie : false,
plugins : "",
theme_advanced_toolbar_location : "bottom",
theme_advanced_toolbar_align : "left",
theme_advanced_path_location : "top",
theme_advanced_resizing : true,
theme_advanced_blockformats : "p,address,pre,h1,h2,h3,h4,h5,h6",
theme_advanced_buttons1 : "bold,italic,underline,strikethrough,hr,cut,paste",
theme_advanced_buttons2 : "",
theme_advanced_buttons3 : "",
elements : "edit-body"
});

can you tell me were is the mistake.
thanks