// JavaScript Document
//global variables that can be used by ALL the function son this page.

var inputs;
var imgFalse = '/work/np/images/false.gif';
var imgTrue = '/work/np/images/true.gif';

function init(){
    replaceChecks();
}

function replaceChecks(){
    //get all the input fields on the page
    inputs = getElementsByClassName("checkBoxes");

    //cycle trough the input fields
    for (var i = 0; i < inputs.length; i++) {
        //check if the input is a 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 = new Function('checkChange(' + i + ');');
			
            //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){
    if (inputs[i].checked) {	
		
        if (inputs[i].id == "fmFrom") {
			unCheckAll();
		}
		else if(i>0){
		    document.getElementById('fmFrom').checked = '';
			document.getElementById('checkImage0').src = imgFalse;
		}

		inputs[i].checked = '';
		document.getElementById('checkImage' + i).src = imgFalse;
    }else {		
		if (inputs[i].id == "fmFrom") {
			checkAll();
		}
		
		inputs[i].checked = 'checked';
		document.getElementById('checkImage' + i).src = imgTrue;
    }
}
function unCheckMaster(i){ 
//i.checked = '';
//i.src = imgFalse;

//		inputs[i].checked = '';
//
//		document.getElementById('checkImage' + i).src = imgFalse;

//	document.getElementById('fmFrom').checked = '';
//	document.getElementById('checkImage1').src = imgFalse;
}
function unCheckAll(){
	inputs = getElementsByClassName("checkBoxes");
    for (var i = 0; i < inputs.length; i++) {
        if (inputs[i].getAttribute('type') == 'checkbox') {
			inputs[i].checked = false;
            document.getElementById('checkImage' + i).src = imgFalse;
        }
    }
}

function checkAll(){
    inputs = getElementsByClassName("checkBoxes");
    for (var i = 0; i < inputs.length; i++) {
        if (inputs[i].getAttribute('type') == 'checkbox') {        
            inputs[i].checked = 'checked';
            document.getElementById('checkImage' + i).src = imgTrue;
        }
    }
}

window.onload = onloadchk;

function chkall()
{
	if(document.getElementById('all').checked==true)
	{
		document.getElementById('acorn').checked=true;
		document.getElementById('companion').checked=true;
		document.getElementById('brooks').checked=true;
		document.getElementById('bison').checked=true;
	}
	else
	{
		document.getElementById('acorn').checked=false;
		document.getElementById('companion').checked=false;
		document.getElementById('brooks').checked=false;
		document.getElementById('bison').checked=false;
	}
}
function chk()
{
	if(document.getElementById('acorn').checked==true && document.getElementById('companion').checked==true && 
	document.getElementById('brooks').checked==true && document.getElementById('bison').checked==true)
	{
		document.getElementById('all').checked=true;
	}
	else
	{
		document.getElementById('all').checked=false;
	}
}

function onloadchk(){
	document.getElementById('all').checked=true;
	chkall();
}