// preset.js  Copyright 2009-2010 by Richard L. Trethewey - All Rights Reserved
// Permission is granted to use this code as long as this copyright notice
// is left intact.  For more information, see http://www.rainbodesign.com/pub/

// Get the query string contents from the page URL used by removing the "?"
var query = location.search.substr(1);

var  search_pattern = '\\+';
var  search_flags = 'g';
var  search_reg_exp = new RegExp(search_pattern, search_flags);

function populate(formName) {
  if (query) {						// Was there a query string?
var params =  query.split("&");				// Yes!  Split them up
var theForm = findForm(formName);			// Locate the form with the correct name/ID
    if (theForm != null) {				// Did we find the form?
     for (q=0; q<params.length; q++) {
      xy = params[q].split("=");			// Split the command into name/value pair
      paramName = xy[0];
      newValue = unescape(xy[1].replace(search_reg_exp, ' '));	// translate query string

       if (theForm.elements[paramName]) {		// does named element exist?

// alert(paramName + ' ' + theForm.elements[paramName] + ' ' + theForm.elements[paramName].type);

       switch(theForm.elements[paramName].type) {
        case 'text':					// type = "text"
        case 'hidden':					// type = "hidden"
	case 'textarea':				// <textarea>
          theForm.elements[paramName].value = newValue;
        break;

        case 'select-one':				// <select>
	  theOption = theForm.elements[paramName];
	  max = theOption.length;
	  for (i = 0; i < max; i++) {
	   if (theOption.options[i].value == newValue) { theOption.options.selectedIndex = i; }
	  }  // end for i
        break;

        case undefined:					// type = "radio"
	if (theForm.elements[paramName]) {		// double-check this element exists
	  theOption = theForm.elements[paramName];
	  max = theOption.length;
	  for (i = 0; i < max; i++) {
	   if (theOption[i].value == newValue) { theOption[i].checked = true; }
	  }  // end for i
	 } // endif exists
        break;

        case 'checkbox':				// type="checkbox"
          theForm.elements[paramName].checked = true;
        break;

       } // end switch
      } // endif theForm.elements[paramName]
    } // end for q
   } // endif {theForm)
 } // endif (query)
} // end populate()

function findForm(theForm) {
if (document.getElementById(theForm)) {			// try ID first
 formElement = document.getElementById(theForm);
  } else {
 for (i=0; i<document.forms.length; i++) {
  if (document.forms[i].name == theForm) { formElement = document.forms[i]; break; }
 } // endFor
} // endif document.getElementById
return formElement;
} // end findForm