/*

  Modifications:
  
    Rob McElroy     7/12/2010
            1. Add functions addEvent and removeEvent.  These functions allow us to chain event handler functions to an event.
            2. Modified how the select tags onchange event is set to to include any existing functions that need to be called.
*/
var checkboxHeight = "25";
var radioHeight = "25";
var selectWidth = "";

/* No need to change anything after this */

function addEvent(obj, type, fn) {
if (obj.addEventListener)
obj.addEventListener(type, fn, false);
else if (obj.attachEvent) {
obj["e" + type + fn] = fn;
obj[type + fn] = function() { obj["e" + type + fn](window.event); }
obj.attachEvent("on" + type, obj[type + fn]);
}
}

function removeEvent(obj, type, fn) {
if (obj.removeEventListener)
obj.removeEventListener(type, fn, false);
else if (obj.detachEvent) {
obj.detachEvent("on" + type, obj[type + fn]);
obj[type + fn] = null;
obj["e" + type + fn] = null;
}
}

/* No need to change anything after this */


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;} .disabled { opacity: 0.5; filter: alpha(opacity=50); }</style>');

var Custom = {
    init: function() {
        var inputs = document.getElementsByTagName("input"), span = Array(), textnode, option, active;
        for (a = 0; a < inputs.length; a++) {
            if ((inputs[a].type == "checkbox" || inputs[a].type == "radio") && inputs[a].className == "styled") {
                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;
                if (!inputs[a].getAttribute("disabled")) {
                    span[a].onmousedown = Custom.pushed;
                    span[a].onmouseup = Custom.check;
                } else {
                    span[a].className = span[a].className += " disabled";
                }
            }
        }
        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]);
                if (!inputs[a].getAttribute("disabled")) {
                    //
                    // We need to grab a reference to the existing onchange event (if one exists) so we can add it
                    // to the list of functions that are called for the onchange event.
                    //
                    // This is needed so we can perform a postback using the asp.net postback model.
                    // In asp.net when you have autopostback = true on a <select> tag it adds an event handler to the onchange event.
                    var oFunction = inputs[a].onchange;
                    addEvent(inputs[a], "change", Custom.choose);
                    if (oFunction != null) {
                        addEvent(inputs[a], "change", oFunction);
                    }
                } else {
                    inputs[a].previousSibling.className = inputs[a].previousSibling.className += " disabled";
                }
            }
        }
        document.onmouseup = Custom.clear;
    },
    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.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;
            }
        }
    }
}

addEvent(window, "load", Custom.init);