// Store variables to control where the popup will appear relative to the cursor position.
// Positive numbers are below and to the right of the cursor, negative numbers are above and to the left.
var xOffset = -180;
var yOffset = -20;

function showPopup(targetObjectId, eventObj)
{
	if (eventObj)
	{
		// hide any currently-visible popups
		hideCurrentPopup();
		
		// stop event from bubbling up any farther
		eventObj.cancelBubble = true;
		
		// move popup div to current cursor position (add scrollTop to account for scrolling for IE)
		var newXCoordinate = (eventObj.pageX)?eventObj.pageX + xOffset:eventObj.x + xOffset + ((document.body.scrollLeft)?document.body.scrollLeft:0);
		var newYCoordinate = (eventObj.pageY)?eventObj.pageY + yOffset:eventObj.y + yOffset + ((document.body.scrollTop)?document.body.scrollTop:0);
		moveObject(targetObjectId, newXCoordinate, newYCoordinate);
		
		// and make it visible
		if (changeObjectVisibility(targetObjectId, 'visible'))
		{
			// if we successfully showed the popup, store its Id on a globally-accessible object
			window.currentlyVisiblePopup = targetObjectId;
			return true;
		}
		else
		{
			// we couldn't show the popup, boo hoo!
			return false;
		}
	}
	else
	{
		// there was no event object, so we won't be able to position anything, so give up
		return false;
	}
}

function hideCurrentPopup()
{
	// note: we've stored the currently-visible popup on the global object window.currentlyVisiblePopup
	if (window.currentlyVisiblePopup)
	{
		changeObjectVisibility(window.currentlyVisiblePopup, 'hidden');
		window.currentlyVisiblePopup = false;
	}
}


// ***********************
// hacks and workarounds *
// ***********************

// initialize hacks whenever the page loads
window.onload = initializeHacks;

// setup an event handler to hide popups for generic clicks on the document
document.onclick = hideCurrentPopup;

function initializeHacks()
{
	// this ugly little hack resizes a blank div to make sure you can click anywhere in the window for Mac MSIE 5
	if ((navigator.appVersion.indexOf('MSIE 5') != -1) && (navigator.platform.indexOf('Mac') != -1) && getStyleObject('blankDiv'))
	{
		window.onresize = explorerMacResizeFix;
	}
	
	resizeBlankDiv();
	
	// this next function creates a placeholder object for older browsers
	createFakeEventObj();
}

function createFakeEventObj()
{
	// create a fake event object for older browsers to avoid errors in function call when we need to pass the event object to functions
	if (!window.event)
	{
		window.event = false;
	}
}

function resizeBlankDiv()
{
	// resize blank placeholder div so IE 5 on mac will get all clicks in window
	if ((navigator.appVersion.indexOf('MSIE 5') != -1) && (navigator.platform.indexOf('Mac') != -1) && getStyleObject('blankDiv'))
	{
		getStyleObject('blankDiv').width = document.body.clientWidth - 20;
		getStyleObject('blankDiv').height = document.body.clientHeight - 20;
	}
}

function explorerMacResizeFix()
{
	location.reload(false);
}

function popupSearchHelp()
{
	window.open('HelpPopup.aspx',
						'SearchHelp',
						'scrollbars=no,width=425,height=410,toolbar=no,status=no,resizable=no')
}