JAVASCRIPT: Get Wordpress page content element

gistfile1

function getPageContent(page_type){
		
	if (page_type == 'page'){
		if ($('.page:not(body)').length)
			return $('.page:not(body)');			 			
	}
	else if (page_type == 'post'){
		if ($('.post:not(body)').length)
			return $('.post:not(body)');			 
		else if ($('article').length)
			return $('article');					
	}
	else if (page_type == 'frontpage'){
		if ($('.post:not(body)').length)
			return $('.post:not(body)');			 
		else if ($('article').length)
			return $('article');	
		else if ($('.page:not(body)').length)
			return $('.page:not(body)');			
	}

	if ($('#main-content').length)
		return $('#main-content');		
	else if ($('.main-content').length)
		return $('.main-content');
	else if ($('#main').length)
		return $('#main');		
	else if ($('.main').length)
		return $('.main');
	else if ($('#content').length)
		return $('#content');
	else if ($('.content').length)
		return $('.content');		
	else if ($('#opl-content').length)
		return $('#opl-content');
	else if ($('.opl-content').length)
		return $('.opl-content');
	else if ($('#body-content').length)
		return $('#body-content');		
	else if ($('.body-content').length)
		return $('.body-content');
	else if ($('#site-content').length)
		return $('#site-content');		
	else if ($('.site-content').length)
		return $('.site-content');
	else if ($('.the-post').length)
		return $('.the-post');
	else if ($('.the-page').length)
		return $('.the-page');
	else if ($('[id^=post-]:not(body)').length)
		return $('[id^=post-]:not(body)');
	else if ($('[class^=post-]:not(body)').length)
		return $('[class^=post-]:not(body)');


	return false;
}

// USAGE

<?php

page_type = '';
if (is_page())
	$page_type = 'page';

if (is_single() || is_archive() || is_category() || is_tag())
	$page_type = 'post';

?>

var page_content = getPageContent(<?php echo $page_type; ?>);