//*****************************************************************************
// Do not remove this notice.
//
// Copyright 2001 by Mike Hall.
// See http://www.brainjar.com for terms of use.
//*****************************************************************************


// Global object to hold drag information.
var dragObj = new Object();
dragObj.zIndex = 0;

var collectorBoxId = null;
var collectorBoxElem = null;
var itemToCollectId = null;	

function itemDragStart(event, id, collectInId, itemId) {  
	collectorBoxId = collectInId;  
	collectorBoxElem = document.getElementById(collectorBoxId);		
	itemToCollectId = itemId;
	//document.forms[0].collectfield.value = itemId;

	var el;
	var x, y;

	// If an element id was given, find it. Otherwise use the element being
	// clicked on.
	if (id) {
		dragObj.elNode = document.getElementById(id);    
	}
	else {
		if (browser.isIE)
		dragObj.elNode = window.event.srcElement;
		if (browser.isNS)
		dragObj.elNode = event.target;

		// If this is a text node, use its parent element.
		if (dragObj.elNode.nodeType == 3)
		dragObj.elNode = dragObj.elNode.parentNode;
	}

	// Get cursor position with respect to the page.
	if (browser.isIE) {
		x = window.event.clientX + document.documentElement.scrollLeft
		+ document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop
		+ document.body.scrollTop;
	}
	if (browser.isNS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}
		
	// Save starting positions of cursor and element.
	dragObj.cursorStartX = x;
	dragObj.cursorStartY = y;
	dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10);
	dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);

	if (isNaN(dragObj.elStartLeft)) dragObj.elStartLeft = 0;
	if (isNaN(dragObj.elStartTop))  dragObj.elStartTop  = 0;

	// Update element's z-index.
	dragObj.elNode.style.zIndex = 1000;

	// Capture mousemove and mouseup events on the page.
	if (browser.isIE) {
		document.attachEvent("onmousemove", itemDragGo);
		document.attachEvent("onmouseup",   itemDragStop);
		window.event.cancelBubble = true;
		window.event.returnValue = false;
	}
	if (browser.isNS) {
		document.addEventListener("mousemove", itemDragGo,   true);
		document.addEventListener("mouseup",   itemDragStop, true);
		event.preventDefault();
	}
}


function dragStart(event, id) {  	

	var el;
	var x, y;

	// If an element id was given, find it. Otherwise use the element being
	// clicked on.
	if (id) {
		dragObj.elNode = document.getElementById(id);    
	}
	else {
		if (browser.isIE)
		dragObj.elNode = window.event.srcElement;
		if (browser.isNS)
		dragObj.elNode = event.target;

		// If this is a text node, use its parent element.
		if (dragObj.elNode.nodeType == 3)
		dragObj.elNode = dragObj.elNode.parentNode;
	}

	// Get cursor position with respect to the page.
	if (browser.isIE) {
		x = window.event.clientX + document.documentElement.scrollLeft
		+ document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop
		+ document.body.scrollTop;
	}
	if (browser.isNS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}
		
	// Save starting positions of cursor and element.
	dragObj.cursorStartX = x;
	dragObj.cursorStartY = y;		
	dragObj.elStartLeft  = parseInt(dragObj.elNode.style.left, 10);
	dragObj.elStartTop   = parseInt(dragObj.elNode.style.top,  10);
	
	if (isNaN(dragObj.elStartLeft)) {	
		dragObj.elStartLeft = 0;
	}
	if (isNaN(dragObj.elStartTop)) {
		dragObj.elStartTop  = 0;
	}

	// Update element's z-index.
	dragObj.elNode.style.zIndex = 1000;

	// Capture mousemove and mouseup events on the page.
	if (browser.isIE) {
		document.attachEvent("onmousemove", dragGo);
		document.attachEvent("onmouseup",   dragStop);
		window.event.cancelBubble = true;
		window.event.returnValue = false;
	}
	if (browser.isNS) {
		document.addEventListener("mousemove", dragGo,   true);
		document.addEventListener("mouseup",   dragStop, true);
		event.preventDefault();
	}
}

function dragGo(event) {

	var x, y;

	// Get cursor position with respect to the page.
	if (browser.isIE) {
		x = window.event.clientX + document.documentElement.scrollLeft
		+ document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop
		+ document.body.scrollTop;
	}
	if (browser.isNS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}

	// Move drag element by the same amount the cursor has moved.
	dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
	dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";
		
	if (browser.isIE) {
		window.event.cancelBubble = true;
		window.event.returnValue = false;
	}
	if (browser.isNS)
		event.preventDefault();
}

function itemDragGo(event) {

	var x, y;

	// Get cursor position with respect to the page.
	if (browser.isIE) {
		x = window.event.clientX + document.documentElement.scrollLeft
		+ document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop
		+ document.body.scrollTop;
	}
	if (browser.isNS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}

	// Move drag element by the same amount the cursor has moved.
	dragObj.elNode.style.left = (dragObj.elStartLeft + x - dragObj.cursorStartX) + "px";
	dragObj.elNode.style.top  = (dragObj.elStartTop  + y - dragObj.cursorStartY) + "px";
		
	//Get co-ords relative to the environment navigator.
	var envNavRelX, envNavRelY;
	envNavRelX = x - parseInt(envNavigator.style.left);
	envNavRelY = y - parseInt(envNavigator.style.top);
		
	//Work out if cursor is in collector box.  
	if((envNavRelX >= parseInt(collectorBoxElem.style.left)) &&    
		(envNavRelY >= parseInt(collectorBoxElem.style.top)) &&
		(envNavRelX < (parseInt(collectorBoxElem.style.left) + 64)) &&    
		(envNavRelY < (parseInt(collectorBoxElem.style.top) + 64))){
			
		collectorBoxElem.style.backgroundColor = "white";		
		document.forms[0].collectfield.value = itemToCollectId;
	} else {
		collectorBoxElem.style.backgroundColor = "";	
		document.forms[0].collectfield.value = "nocollect";
	}

	if (browser.isIE) {
		window.event.cancelBubble = true;
		window.event.returnValue = false;
	}
	if (browser.isNS)
		event.preventDefault();
}

function dragStop(event) {  

	// Stop capturing mousemove and mouseup events.
	if (browser.isIE) {
		document.detachEvent("onmousemove", dragGo);
		document.detachEvent("onmouseup",   dragStop);
	}
	if (browser.isNS) {
		document.removeEventListener("mousemove", dragGo,   true);
		document.removeEventListener("mouseup",   dragStop, true);
	}
}
	
function itemDragStop(event) {  
	var x, y;

	// Get cursor position with respect to the page.
	if (browser.isIE) {
		x = window.event.clientX + document.documentElement.scrollLeft
		+ document.body.scrollLeft;
		y = window.event.clientY + document.documentElement.scrollTop
		+ document.body.scrollTop;
	}
	if (browser.isNS) {
		x = event.clientX + window.scrollX;
		y = event.clientY + window.scrollY;
	}
	
	//Get co-ords relative to the environment navigator.
	var envNavRelX, envNavRelY;
	envNavRelX = x - parseInt(envNavigator.style.left);
	envNavRelY = y - parseInt(envNavigator.style.top);
		
	if((envNavRelX >= parseInt(collectorBoxElem.style.left)) &&    
		(envNavRelY >= parseInt(collectorBoxElem.style.top))){    
		
	}
	else {
		//document.forms[0].collectfield.value = "nocollect";
	}   				

	// Stop capturing mousemove and mouseup events.
	if (browser.isIE) {
		document.detachEvent("onmousemove", dragGo);
		document.detachEvent("onmouseup",   dragStop);
	}
	if (browser.isNS) {
		document.removeEventListener("mousemove", dragGo,   true);
		document.removeEventListener("mouseup",   dragStop, true);
	}
}