// Form Functions  v1.0
// documentation: http://www.dithered.com/javascript/form/index.html
// license: http://creativecommons.org/licenses/by/1.0/
// code by Chris Nott (chris[at]dithered[dot]com)


// Convert a list of strings into a 'get' query string
function makeSearchString() {
   var args = makeSearchString.arguments;
   var searchString = "?";
   var pair;
   for (var i = 0; i < args.length; i++) {
      pair = escape(args[i++]) + "=";
      pair += escape(args[i]);
      searchString += pair + "&";
   }
   return searchString.substring(0, searchString.length - 1);
}


// Create a 'get' query string with the data from a given form
function gatherFormData(form) {
   var formData = '';
   var element;
   
   // For each form element, extract the name and value
   for (var i = 0; i < form.elements.length; i++) {
      element = form.elements[i];
      if (element.type == "text" || element.type == "password" || element.type == "textarea") formData += "'" + element.name + "', '" + escape(element.value) + "', ";
      else if (element.type.indexOf("select") != -1) {
         for (var j = 0; j < element.options.length; j++) {
            if (element.options[j].selected == true) formData += "'" + element.name + "', '" + element.options[element.selectedIndex].value + "', ";
         }
      }
      else if (element.type == "checkbox" && element.checked) formData += "'" + element.name + "', '" + element.value + "', ";
      else if (element.type == "radio" && element.checked == true) formData += "'" + element.name + "', '" + element.value + "', ";
   }
   
   // Feed strings to makeSearchString() to do 'get' query string conversion
   return (eval("makeSearchString(" + formData.substring(0, formData.length - 2) + ")"));
}


// Clear a form so that default initial values are erased
function clearForm(form) {
   var element;
   for (var i = 0; i < form.elements.length; i++) {
      element = form.elements[i];
      if (element.type == "text" || element.type == "password" || element.type == "textarea") element.value = '';
      else if (element.type.indexOf("select") != -1) element.selectedIndex = -1;
      else if (element.type == "checkbox" && element.checked) element.checked = false;
      else if (element.type == "radio" && element.checked == true) element.checked = false;
   }
}


// Build an associative array with all name and value pairs in a 'get' query string
function getSearchAsArray() {
   var searchQuery = new Array;
   var pair;
   var temp;
   var search = location.search;
   
   // replace all '+'s with ' 's because unescape() doesn't do it
   search = search.replace(/\+/g, ' ');
   
   // for each pair, separate, unescape and place into the associate array
   var split = 1;
   while (split > 0) {
      split = search.lastIndexOf('&');
      if (split == -1) split = 0;
      pair = search.substring(split + 1, search.length);
      
      // multiple select values should be placed in an array
      if (searchQuery[unescape(pair.substring(0, pair.indexOf('=')))] != null) {
         temp = searchQuery[unescape(pair.substring(0, pair.indexOf('=')))];
         searchQuery[unescape(pair.substring(0, pair.indexOf('=')))] = new Array(temp, unescape(pair.substring(pair.indexOf('=') + 1)));
      }
      
      // all other form elements have a one-to-one name and value relationship
      else searchQuery[unescape(pair.substring(0, pair.indexOf('=')))] = unescape(pair.substring(pair.indexOf('=') + 1));
      
      search = search.substring(0, split);
   }
   return searchQuery;
}
var query = getSearchAsArray();