function books_showad() {
    var w = window;

    if (w.books_o=='1') {
        books_url = 'http://www.bogorm.dk/bogannoncerasp.aspx?' +
            't=' + escape(w.books_t.replace(/\s/g, '+')) +
			'&f=' + escape(w.books_f.replace(/\s/g, '+')) +
			'&i=' + w.books_i +
			'&c=' + w.books_c +
			'&a=' + w.books_a
    } else {
        books_url = 'http://www.bogorm.dk/bogannoncer.aspx?' +
            't=' + escape(w.books_t.replace(/\s/g, '+')) +
			'&f=' + escape(w.books_f.replace(/\s/g, '+')) +
			'&i=' + w.books_i +
			'&c=' + w.books_c +
			'&a=' + w.books_a
    }	
    
        frameheight = 250 * (Math.ceil(w.books_a / 4)); //180
        framewidth = 600;
        displayiframe(books_url, frameheight, framewidth, 'bookad');
   
}
function displayiframe(books_url, frameheight, framewidth, frameid) {

    
   strframe='<ifr' + 'ame' +
                     ' name=books' +
                     ' id=' + frameid +
                     ' width=' + framewidth +
                     ' height=' + frameheight +
                     ' src=' + books_url +
		             ' frameborder=0 ' +
                     ' marginwidth="0"' +
                     ' marginheight="0"' +
                     ' vspace="0"' +
                     ' hspace="0"' +
                     ' allowtransparency="true"' +
                     ' scrolling="no" rel="nofollow"></ifr' + 'ame>'
  document.write(strframe);

  
}


    books_showad();