Post to entire document like a form using jquery?

i wan't to pass a variable without using get to php, so, i'm using post with jquery, but i can't write the result into the document (refresh all the page)

here is the code:

$.post("/"+$(this).attr("href"),{returnto:$(this).attr("rel")},function(a){$(document).html(a);});return 开发者_Python百科false;});

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The document is not the place to write your result as the document is the meta envelope around the html page you see. Rather use the body:

$("BODY").html("MY ANSWER IS: "+a);