Nintendo GameCube Preview CD-ROM/NINTENDOGAMECUBE.iso/site/js/form.js

Text File | 2002-01-08 | 7KB | 154 lines

// Form Functions  v1.0
// http://www.dithered.com/javascript/form/index.html
// code by Chris Nott ([e-mail])


// 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 + "', '" + 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) + ")"));
}


// Transfer form data from a visible form to a hidden one
function transferToHiddenForm(sourceForm, destinationForm) {
    var sourceElement, destinationElement, sourceOption;

    // for each visible form element, transfer the associated value to the hidden form element with the same name
    for (var i = 0; i < sourceForm.elements.length; i++) {
        sourceElement = sourceForm.elements[i];

        // make sure there is an associated hidden element for the visible one
        if (sourceElement.name == '') continue;
        destinationElement = eval('destinationForm.' + sourceElement.name);
        if (destinationElement == null) continue;

        if (sourceElement.type == "text" || sourceElement.type == "password" || sourceElement.type == "textarea") destinationElement.value = sourceElement.value;
        else if (sourceElement.type == "select-one") destinationElement.value = sourceElement.options[sourceElement.selectedIndex].value;

        // for multiple selects, create a |-delimited string of values
        else if (sourceElement.type == "select-multiple") {
            destinationElement.value = '|';
            for (var j = 0; j < sourceElement.options.length; j++) {
                sourceOption = sourceElement.options[j];
                if (sourceOption.selected) destinationElement.value += sourceOption.value + '|';
            }
        }

        else if (sourceElement.type == "checkbox" && sourceElement.checked == true) destinationElement.value = sourceElement.value;
        else if (sourceElement.type == "radio" && sourceElement.checked == true) destinationElement.value = sourceElement.value;
    }
}


// Transfer form data from a hidden form to a visible one
function transferFromHiddenForm(sourceForm, destinationForm) {
    var sourceElement, destinationElement, sourceOption;

    // for each visible form element, transfer the associated value from the hidden form element with the same name
    for (var i = 0; i < destinationForm.elements.length; i++) {
        destinationElement = destinationForm.elements[i];

        // make sure there is an associated hidden element for the visible one
        if (destinationElement.name == '') continue;
        sourceElement = eval('sourceForm.' + destinationElement.name);
        if (sourceElement == null) continue;

        if (destinationElement.type == "text" || destinationElement.type == "password" || destinationElement.type == "textarea") destinationElement.value = sourceElement.value;
        else if (destinationElement.type == "select-one") {
            for (var j = 0; j < destinationElement.options.length; j++) {
                if (sourceElement.value == destinationElement.options[j].value) {
                    destinationElement.selectedIndex = j;
                    break;
                }
            }
        }

        // look for multiple select values to be delimited by '|' in the hidden form element
        else if (destinationElement.type == "select-multiple") {
            for (var j = 0; j < destinationElement.options.length; j++) {
                if (sourceElement.value.indexOf('|' + destinationElement.options[j].value + '|') != -1) destinationElement.options[j].selected = true;
            }
        }

        else if (destinationElement.type == "checkbox") destinationElement.checked = true;
        else if (destinationElement.type == "radio" && destinationElement.value == sourceElement.value) destinationElement.checked = true;
    }
}


// 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();