/*

CUSTOM FORM ELEMENTS

Created by Ryan Fait
www.ryanfait.com

The only thing you need to change in this file is the following
variables: checkboxHeight, radioHeight and selectWidth.

Replace the first two numbers with the height of the checkbox and
radio button. The actual height of both the checkbox and radio
images should be 4 times the height of these two variables. The
selectWidth value should be the width of your select list image.

You may need to adjust your images a bit if there is a slight
vertical movement during the different stages of the button
activation.

Visit http://ryanfait.com/ for more information.

*/

var checkboxHeight = "18";
var radioHeight = "25";
var selectWidth = "190";

/* No need to change anything after this */

// Don't run the script on IE6 as it's buggy and IE6 can't handle transparent PNGs in CSS backgrounds
// Some versions of IE7 report as IE7 *AND* IE6 so deal with that
var IE7 = /msie|MSIE 7/.test(navigator.userAgent);
var IE6 = /msie|MSIE 6/.test(navigator.userAgent);
if (IE7 && IE6) { IE6 = false; }

if (!IE6) {
    document.write('<style type="text/css">input.styled { display: none; } select.styled { position: relative; width: ' + selectWidth + 'px; opacity: 0; filter: alpha(opacity=0); z-index: 5; }</style>');
}

var Custom = {
    init: function() {
        if (!IE6) {
            var inputs = document.getElementsByTagName("input"), span = Array(), textnode, option, active;
            for (a = 0; a < inputs.length; a++) {
                /* added  || inputs[a].parentNode.className == "styledparent") to line below to deal with checkboxes generated by asp checkboxlists */
                if ((inputs[a].type == "checkbox" || inputs[a].type == "radio") && (inputs[a].className == "styled" || inputs[a].parentNode.className == "styledparent")) {
                    span[a] = document.createElement("span");
                    span[a].className = inputs[a].type;

                    if (inputs[a].checked == true) {
                        if (inputs[a].type == "checkbox") {
                            position = "0 -" + (checkboxHeight * 2) + "px";
                            span[a].style.backgroundPosition = position;
                        } else {
                            position = "0 -" + (radioHeight * 2) + "px";
                            span[a].style.backgroundPosition = position;
                        }
                    }
                    inputs[a].parentNode.insertBefore(span[a], inputs[a]);
                    inputs[a].onchange = Custom.clear;
                    span[a].onmousedown = Custom.pushed;
                    span[a].onmouseup = Custom.check;
                    document.onmouseup = Custom.clear;
                    // extra line added to stop duplicate spans being created when the main function is called on an ajax update
                    // styledactive defined as visibility:hidden; position:absolute; left:-9999px;
                    // one or more functions below may still need tweaking
                    inputs[a].className = "styledactive";
                }
            }
            inputs = document.getElementsByTagName("select");
            for (a = 0; a < inputs.length; a++) {
                if (inputs[a].className == "styled") {
                    option = inputs[a].getElementsByTagName("option");
                    active = option[0].childNodes[0].nodeValue;
                    textnode = document.createTextNode(active);
                    for (b = 0; b < option.length; b++) {
                        if (option[b].selected == true) {
                            textnode = document.createTextNode(option[b].childNodes[0].nodeValue);
                        }
                    }
                    span[a] = document.createElement("span");
                    span[a].className = "select";
                    span[a].id = "select" + inputs[a].name;
                    span[a].appendChild(textnode);
                    inputs[a].parentNode.insertBefore(span[a], inputs[a]);
                    inputs[a].onchange = Custom.choose;
                }
            }
        }
    },
    pushed: function() {
        element = this.nextSibling;
        if (element.checked == true && element.type == "checkbox") {
            this.style.backgroundPosition = "0 -" + checkboxHeight * 3 + "px";
        } else if (element.checked == true && element.type == "radio") {
            this.style.backgroundPosition = "0 -" + radioHeight * 3 + "px";
        } else if (element.checked != true && element.type == "checkbox") {
            this.style.backgroundPosition = "0 -" + checkboxHeight + "px";
        } else {
            this.style.backgroundPosition = "0 -" + radioHeight + "px";
        }
    },
    check: function() {
        element = this.nextSibling;
        if (!element.disabled) {
            if (element.checked == true && element.type == "checkbox") {
                this.style.backgroundPosition = "0 0";
                element.checked = false;
            } else {
                if (element.type == "checkbox") {
                    this.style.backgroundPosition = "0 -" + checkboxHeight * 2 + "px";
                } else {
                    this.style.backgroundPosition = "0 -" + radioHeight * 2 + "px";
                    group = this.nextSibling.name;
                    inputs = document.getElementsByTagName("input");
                    for (a = 0; a < inputs.length; a++) {
                        if (inputs[a].name == group && inputs[a] != this.nextSibling) {
                            inputs[a].previousSibling.style.backgroundPosition = "0 0";
                        }
                    }
                }
                element.checked = true;
            }
        }
    },
    clear: function() {
        inputs = document.getElementsByTagName("input");
        for (var b = 0; b < inputs.length; b++) {
            if (inputs[b].type == "checkbox" && inputs[b].checked == true && inputs[b].className == "styled") {
                inputs[b].previousSibling.style.backgroundPosition = "0 -" + checkboxHeight * 2 + "px";
            } else if (inputs[b].type == "checkbox" && inputs[b].className == "styled") {
                inputs[b].previousSibling.style.backgroundPosition = "0 0";
            } else if (inputs[b].type == "radio" && inputs[b].checked == true && inputs[b].className == "styled") {
                inputs[b].previousSibling.style.backgroundPosition = "0 -" + radioHeight * 2 + "px";
            } else if (inputs[b].type == "radio" && inputs[b].className == "styled") {
                inputs[b].previousSibling.style.backgroundPosition = "0 0";
            }
        }
    },
    choose: function() {
        option = this.getElementsByTagName("option");
        for (d = 0; d < option.length; d++) {
            if (option[d].selected == true) {
                document.getElementById("select" + this.name).childNodes[0].nodeValue = option[d].childNodes[0].nodeValue;
            }
        }
    }
}
window.onload = Custom.init;