/*

Modified by Greg Hogan
www.tech-nique.co.uk
Modifications add the ability to store the initial checkbox/radio button status and restore them on form reset.


CUSTOM FORM ELEMENTS

Created by Ryan Fait
www.ryanfait.com

*/

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

/* 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; }</style>');
// filter attribute fails validation so removed it
document.write('<style type="text/css">input.styled { display: none; } select.styled { position: relative; width: ' + selectWidth + 'px; z-index: 5; }</style>');


var kickoff = Array(); // added gjh - stores initial checkbox status

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;
				
				kickoff[a] = "0 0px"; // register defaults for kickoff				
				
				if(inputs[a].checked == true) {
					if(inputs[a].type == "checkbox") {
						position = "0 -" + (checkboxHeight*2) + "px";
						kickoff[a] = position; // set kickoff if checked
						span[a].style.backgroundPosition = kickoff[a]; //position;
					} 
					else 
					{
						position = "0 -" + (radioHeight*2) + "px";
						kickoff[a] = position; // set kickoff if checked
						span[a].style.backgroundPosition = kickoff[a]; //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;

			}
		}
		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.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; MM_preloadImages('images/navbar/n1h.gif','images/navbar/n2h.gif','images/navbar/n3h.gif','images/navbar/n4h.gif','images/icon_buttons/icon_01h.gif','images/icon_buttons/icon_02h.gif','images/icon_buttons/icon_03h.gif','images/icon_buttons/icon_04h.gif','images/icon_buttons/icon_05h.gif','images/icon_buttons/icon_06h.gif','images/icon_buttons/icon_07h.gif','images/icon_buttons/icon_08h.gif','images/icon_buttons/icon_09h.gif','images/icon_buttons/icon_10h.gif','images/navbar/tabs.gif','images/navbar/tabh.gif');


// gjh - added function to reset checkboxes and radio buttons to starting condition 
// called on form reset
function chkReset() {
		var inputs = document.getElementsByTagName("input");
		for(i = 0; i < inputs.length; i++) {
			if((inputs[i].type == "checkbox" || inputs[i].type == "radio") && inputs[i].className == "styled") {
			inputs[i].previousSibling.style.backgroundPosition = kickoff[i];
		} 
	} 
	document.getElementById("demo").reset();
} 

function formSubmit(){
	validateForm(document.getElementById("demo"));
}