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- function is_in_list(list, num) {
- for (i = 0; i < list.length; i++) {
- if (list[i] == num)
- return true;
- }
- return false;
- }
-
- function any_allergies_set()
- {
- for (a = 0; a < allergies.length; a++) {
- var e = document.getElementById("allergy_" + allergies[a]);
- if (e.checked)
- return true;
- }
- return false;
- }
-
- function unhighlight() {
- for (f = 0; f < food_count; f++) {
- var e = document.getElementById("f"+f);
- e.style.background = "#ffffff";
- }
- }
-
- function fix_hrefs() {
- // change all links to submit-buttons
- for (f = 0; f < document.links.length; f++) {
- var href = document.links[f].href;
- var i = href.lastIndexOf('/') + 1;
- if (href[i] >= '1' && href[i] <= '7' && href[i+1] == '.') {
- document.links[f].onclick = function() {
- document.forms[0].action = this.href;
- document.forms[0].submit();
- return false;
- }
- }
- }
- }
-
- function highlight() {
- fix_hrefs();
- if (!any_allergies_set()) {
- unhighlight();
- return;
- }
-
- for (f = 0; f < food_count; f++) {
- var eatable = 1;
- for (a = 0; a < allergies.length; a++) {
- var e = document.getElementById("allergy_" + allergies[a]);
- if (e.checked) {
- if (is_in_list(eatable_foods[allergies[a]], f)) {
- // still (maybe) eatable
- } else if (is_in_list(maybe_eatable_foods[allergies[a]], f)) {
- // just maybe eatable
- eatable = 0;
- } else {
- eatable = -1;
- }
- }
- }
- var e = document.getElementById("f"+f);
- if (eatable < 0) {
- e.style.background = "#ffffff";
- //e.style.display = "none";
- } else {
- //e.style.display = "list-item";
- e.style.background = eatable > 0 ? "#ffff00" : "#cccccc";
- }
- }
- }
-
- function url_param(name)
- {
- // From http://www.netlobo.com/url_query_string_javascript.html
- name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
- var regexS = "[\\?&]"+name+"=([^&#]*)";
- var regex = new RegExp( regexS );
- var results = regex.exec( window.location.href );
- if( results == null )
- return "";
- else
- return results[1];
- }
-
- function set_allergies()
- {
- for (a = 0; a < allergies.length; a++) {
- var e = document.getElementById("allergy_" + allergies[a]);
- if (url_param("allergy_" + allergies[a]) != "")
- e.checked = true;
- }
- highlight();
- }
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