/*

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 FrmElmNm = "CstmFrmElmnt";
var FrmBrwsNm = "CstmBrowseElmnt";

var checkboxHeight = new Array();
checkboxHeight.push("25");

var radioHeight = new Array();
radioHeight.push("25");

var selectWidth = new Array();
selectWidth.push("212");
selectWidth.push("100");
selectWidth.push("51");

var browseWidth = new Array();
browseWidth.push("212");

var ElemLength = checkboxHeight.length;
if(radioHeight.length > ElemLength) ElemLength = radioHeight.length;
if(selectWidth.length > ElemLength) ElemLength = selectWidth.length;

var ElemRegExp1 = new RegExp("[^A-Za-z]");
var ElemRegExp2 = new RegExp("[^0-9]");

/* No need to change anything after this */
for(var n = 0; n<ElemLength; n++){
	document.write('<style type="text/css">input.'+FrmElmNm+n+' { display: none; } select.'+FrmElmNm+n+'  { position: relative; width: '+selectWidth[n]+'px; opacity: 0; filter:alpha(opacity=0); z-index:5; }</style>');
}
for(var n = 0; n<browseWidth.length; n++){
	document.write('<style type="text/css">input.'+FrmBrwsNm+n+' { position: relative; width: '+browseWidth[n]+'px; opacity:0; filter:alpha(opacity=0); z-index:5; }</style>');
}
var Custom = {
	init: function() {
		var inputs = document.getElementsByTagName("input"), span = Array(), textnode, option, active;
		for(a = 0; a < inputs.length; a++) {
			var ClassName = inputs[a].className.replace(ElemRegExp1,''); var ClassNum = parseInt(inputs[a].className.replace(ElemRegExp2,''));
			if((inputs[a].type == "checkbox" || inputs[a].type == "radio") && ClassName == FrmElmNm) {
				span[a] = document.createElement("span");
				span[a].className = inputs[a].type.toLowerCase()+'_'+inputs[a].className;

				if(inputs[a].checked == true) {
					if(inputs[a].type.toLowerCase() == "checkbox") 				position = "0 -" + (checkboxHeight[ClassNum]*2) + "px";
					else 																									position = "0 -" + (radioHeight[ClassNum]*2) + "px";
					span[a].style.backgroundPosition = position;
				}
				
				span[a].id = "select" + inputs[a].name;
				inputs[a].parentNode.insertBefore(span[a], inputs[a]);
				if(inputs[a].onchange != null) span[a].onchange = inputs[a].onchange;
				if(inputs[a].onclick != null) span[a].onclick = inputs[a].onclick;
				if(inputs[a].onblur != null) span[a].onblur = inputs[a].onblur;
				if(inputs[a].onmouseover != null) span[a].onmouseover = inputs[a].onmouseover;
				if(inputs[a].onmouseout != null) span[a].onmouseout = inputs[a].onmouseout;
				if(inputs[a].title != null) span[a].title = inputs[a].title;
				
				inputs[a].onchange = Custom.clear;
				span[a].onmousedown = Custom.pushed;
				span[a].onmouseup = Custom.check;
				document.onmouseup = Custom.clear;
			} else if(inputs[a].type.toLowerCase() == "file" && ClassName == FrmBrwsNm) {
				span[a] = document.createElement("span");
				textnode = document.createTextNode(inputs[a].value);
				span[a].className = inputs[a].type.toLowerCase()+'_'+inputs[a].className;
				span[a].id = "browse" + inputs[a].name;
				span[a].appendChild(textnode);
				inputs[a].parentNode.insertBefore(span[a], inputs[a]);
				inputs[a].onmouseout = inputs[a].onchange = Custom.file;
			}
		}
		inputs = document.getElementsByTagName("select");
		for(a = 0; a < inputs.length; a++) {
			var ClassName = inputs[a].className.replace(ElemRegExp1,''); var ClassNum = parseInt(inputs[a].className.replace(ElemRegExp2,''));
			if(ClassName == FrmElmNm) {
				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_'+inputs[a].className;
				span[a].id = "select" + inputs[a].name;
				span[a].appendChild(textnode);
				inputs[a].parentNode.insertBefore(span[a], inputs[a]);
				
				if(inputs[a].onchange != null) span[a].onchange = inputs[a].onchange;
				if(inputs[a].onclick != null) span[a].onclick = inputs[a].onclick;
				if(inputs[a].onblur != null) span[a].onblur = inputs[a].onblur;
				if(inputs[a].onmouseover != null) span[a].onmouseover = inputs[a].onmouseover;
				if(inputs[a].onmouseout != null) span[a].onmouseout = inputs[a].onmouseout;
				if(inputs[a].title != null) span[a].title = inputs[a].title;
				
				inputs[a].onchange = Custom.choose;
			}
		}
	},
	setElem: function(Elem) {
		var span = Array(), textnode, option, active, a = document.getElementsByTagName("input").length;
		var ClassName = Elem.className.replace(ElemRegExp1,''); var ClassNum = parseInt(Elem.className.replace(ElemRegExp2,''));
		if((Elem.type.toLowerCase() == "checkbox" || Elem.type.toLowerCase() == "radio") && ClassName == FrmElmNm) {
			span[a] = document.createElement("span");
			span[a].className = Elem.type.toLowerCase()+'_'+Elem.className;
			
			if(Elem.checked == true) {
				if(Elem.type.toLowerCase() == "checkbox") 			position = "0 -" + (checkboxHeight[ClassNum]*2) + "px";
			  else 																						position = "0 -" + (radioHeight[ClassNum]*2) + "px";
				span[a].style.backgroundPosition = position;
			}
			
			span[a].id = "select" + Elem.name;
			Elem.parentNode.insertBefore(span[a], Elem);
			if(Elem.onchange != null) span[a].onchange = Elem.onchange;
			if(Elem.onclick != null) span[a].onclick = Elem.onclick;
			if(Elem.onblur != null) span[a].onblur = Elem.onblur;
			if(Elem.onmouseover != null) span[a].onmouseover = Elem.onmouseover;
			if(Elem.onmouseout != null) span[a].onmouseout = Elem.onmouseout;
			if(Elem.title != null) span[a].title = Elem.title;
			
			Elem.onchange = Custom.clear;
			span[a].onmousedown = Custom.pushed;
			span[a].onmouseup = Custom.check;
			
		} else if(Elem.type.toLowerCase() == "file" && ClassName == FrmBrwsNm) {
				span[a] = document.createElement("span");
				textnode = document.createTextNode(Elem.value);
				span[a].className = Elem.type.toLowerCase()+'_'+Elem.className;
				span[a].id = "browse" + Elem.name;
				span[a].appendChild(textnode);
				Elem.parentNode.insertBefore(span[a], Elem);
				Elem.onmouseout = Elem.onchange = Custom.file;
		} else if((Elem.type.toLowerCase() == "select" || Elem.type.toLowerCase() == "select-one") && ClassName == FrmElmNm) {
			option = Elem.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_"+Elem.className;;
			
			if(Elem.onchange != null) span[a].onchange = Elem.onchange;
			
			span[a].id = "select" + Elem.name;
			span[a].appendChild(textnode);
			Elem.parentNode.insertBefore(span[a], Elem);
			Elem.onchange = Custom.choose;
		}
	},
	pushed: function() {
		element = this.nextSibling;
		var ClassName = element.className.replace(ElemRegExp1,''); var ClassNum = parseInt(element.className.replace(ElemRegExp2,''));
		if(element.checked == true && element.type.toLowerCase() == "checkbox") 					position = "0 -" + (checkboxHeight[ClassNum]*3) + "px";
		else if(element.checked == true && element.type.toLowerCase() == "radio") 				position = "0 -" + (radioHeight[ClassNum]*3) + "px";
		else if(element.checked != true && element.type.toLowerCase() == "checkbox") 			position = "0 -" + checkboxHeight[ClassNum] + "px";
		else 																																							position = "0 -" + radioHeight[ClassNum] + "px";
		this.style.backgroundPosition = position;
	},
	check: function() {
		element = this.nextSibling;
		var ClassName = element.className.replace(ElemRegExp1,''); var ClassNum = parseInt(element.className.replace(ElemRegExp2,''));
		if(element.checked == true && element.type.toLowerCase() == "checkbox") {
			this.style.backgroundPosition = "0 0";
			element.checked = false;
		} else {
			if(element.type.toLowerCase() == "checkbox") {
				this.style.backgroundPosition = "0 -" + (checkboxHeight[ClassNum]*2) + "px";
			} else {
				this.style.backgroundPosition = "0 -" + (radioHeight[ClassNum]*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;
		}
		if(this.onchange != null) this.onchange();
	},
	clear: function() {
		inputs = document.getElementsByTagName("input");
		for(var b = 0; b < inputs.length; b++) {
			var ClassName = inputs[b].className.replace(ElemRegExp1,''); var ClassNum = parseInt(inputs[b].className.replace(ElemRegExp2,''));
			position = "0 0";
			if(inputs[b].type.toLowerCase() == "checkbox" && inputs[b].checked == true && ClassName == FrmElmNm) 	position = "0 -" + (checkboxHeight[ClassNum]*2) + "px";
			else if(inputs[b].type.toLowerCase() == "checkbox" && ClassName == FrmElmNm)													position = "0 0";
			else if(inputs[b].type.toLowerCase() == "radio" && inputs[b].checked && ClassName == FrmElmNm) 				position = "0 -" + (radioHeight[ClassNum]*2) + "px";
			else if(inputs[b].type.toLowerCase() == "radio" && ClassName == FrmElmNm) 														position = "0 0";
			inputs[b].previousSibling.style.backgroundPosition = position;
		}
	},
	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;
				if(document.getElementById("select" + this.name).onchange) document.getElementById("select" + this.name).onchange();
			}
		}
	},
	file: function() {
		document.getElementById("browse" + this.name).childNodes[0].nodeValue = this.value;
	}
}
window.onload = Custom.init;