//global variables that can be used by ALL the function son this page.
var inputs;
var inputIDs;
var imgFalse = 'img/bg_unchecked.gif';
var imgTrue = 'img/bg_checked.gif';

//this function runs when the page is loaded, put all your other onload stuff in here too.
function init() {
	replaceChecks();
}

function replaceChecks() {
	//get all the input fields on the page
	inputs = document.getElementsByTagName('input');
	inputIDs = new Array();
	//cycle trough the input fields
	for(var i=0; i < inputs.length; i++) {
		//check if the input is a checkbox
		inputIDs.push(inputs[i].getAttribute('id'));
		if(inputs[i].getAttribute('type') == 'checkbox') {
			//create a new image
			var img = document.createElement('img');
			
			//check if the checkbox is checked
			if(inputs[i].checked) {
				img.src = imgTrue;
			} else {
				img.src = imgFalse;
			}

			//set image ID and onclick action
			img.id = 'checkImage'+i;
			//set image 
			img.onclick = checkChange;
			//place image in front of the checkbox
			inputs[i].parentNode.insertBefore(img, inputs[i]);
			
			//hide the checkbox
			inputs[i].style.display='none';
		}
	}
}

//change the checkbox status and the replacement image
function checkChange(i) {
	var i = parseInt($("#"+this.id+" + input").attr('id').replace('check_',''));
	if( !isNaN(i) )
	{
		if(inputs[i].checked) {
			if($.browser.msie) {
				read(i);
			}
			inputs[i].checked = false;
			$('#checkImage'+i).attr('src',imgFalse);
		} else {
			if($.browser.msie) {
				unread(i);
			}
			inputs[i].checked = true;
			$('#checkImage'+i).attr('src',imgTrue);
		}
	}
	else
	{
		var input = $("#contactArea .sendCopy input");
		var image = $("#contactArea .sendCopy img");
		if(input.attr('checked')) {
			input.attr('checked', false);
			image.attr('src',imgFalse);
		}
		else {
			input.attr('checked', true);
			image.attr('src',imgTrue);
		}
		
	}
}

window.onload = init;