/*

CUSTOM FORM ELEMENTS

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.

Aangepast om zowel prototype als jquery te begrijpen.

*/

var checkboxHeight = "15";
var radioHeight = "15";
var selectWidth = "175";

/* 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; z-index: 5; }</style>');

var Custom = {
	span: Array(),
  	hasClassName: function(element, className) {
	  if(typeof element.className == 'undefined') { return; }
    	  var elementClassName = element.className;
          return (elementClassName.length > 0 && (elementClassName == className ||
          new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
        },
	addClassName: function(element, className) {
          if (!Custom.hasClassName(className))
            element.className += (element.className ? ' ' : '') + className;
          return element;
	},
	init: function() {
		var inputs = document.getElementsByTagName("input"), textnode, option, active, selects, span = Array();
		for(a = 0; a < inputs.length; a++) {
			if((inputs[a].type == "checkbox" || inputs[a].type == "radio") && (Custom.hasClassName(inputs[a], "styled") && !Custom.hasClassName(inputs[a], 'style_applied'))) {
				span[a] = document.createElement("span");
				span[a].className = inputs[a].type;

				Custom.addClassName(inputs[a], 'style_applied');

				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;
					}
				}
				Custom.span.push(inputs[a].parentNode.insertBefore(span[a], inputs[a]));
				span[a].onmousedown = Custom.pushed;
				span[a].onmouseup = Custom.check;
				document.onmouseup = Custom.clear;
			}
		}

		selects = document.getElementsByTagName("select");
		for(a = 0; a < selects.length; a++) {
			if(selects[a].className == "styled") {
				option = selects[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" + selects[a].name;
				span[a].appendChild(textnode);
				Custom.span.push(selects[a].parentNode.insertBefore(span[a], selects[a]));
				selects[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() {
		device = this.nextSibling;
		if(device.checked == true && device.type == "checkbox") {
			this.style.backgroundPosition = "0 0";
			device.checked = false;
		} else {
			if(device.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";
					}
				}
			}
			device.checked = true;
		}
	},
	clear: function() {
		var clear = document.getElementsByTagName("input");
		for(var b = 0; b < clear.length; b++) {
			if(typeof clear[b].previousSibling == 'Object') {
				if(clear[b].type == "checkbox" && clear[b].checked == true) {
					clear[b].previousSibling.style.backgroundPosition = "0 -" + checkboxHeight*2 + "px";
				} else if(clear[b].type == "checkbox") {
					clear[b].previousSibling.style.backgroundPosition = "0 0";
				} else if(clear[b].type == "radio" && clear[b].checked == true) {
					clear[b].previousSibling.style.backgroundPosition = "0 -" + radioHeight*2 + "px";
				} else if(clear[b].type == "radio") {
					clear[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;
			}
		}
	}
}

if(typeof jQuery != 'undefined') {
 /* jquery */
  jQuery(document).ready(Custom.init);
} else if(typeof Event.observe != 'undefined') {
  /* prototype */
  Event.observe(window, 'load', Custom.init);
}