// global variables
var isMozilla;
var objDiv = null;
var originalDivHTML = "";
var DivID = "";
var over = false;

function displayWindow()
{
    var w, h;
    w = 610;
    h = 650;
    displayFloatingDiv('ytvh', '', w, h);
}

function buildDimmerDiv()
{
    document.write('<div id="dimmer" class="dimmer" style="width:'+ window.screen.width + 'px; height:' + window.screen.height +'px"></div>');
}

function GetClientSize() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  return [ myWidth, myHeight ];
}
function displayFloatingDiv(divId, title, width, height)
{
    var left, top, aWH;

    aWH = GetClientSize();

    left = Math.floor(aWH[0]/2 - width/2);
    top = Math.floor(aWH[1]/2 - height/2);

	DivID = divId;

	document.getElementById('dimmer').style.display = "block";
    document.getElementById('dimmer').style.visibility = "visible";

    document.getElementById(divId).style.width = width + 'px';
    document.getElementById(divId).style.height = height + 'px';
    document.getElementById(divId).style.left = left + 'px';
    document.getElementById(divId).style.top = top + 'px';

	var addHeader;

	if (originalDivHTML == "")
	    originalDivHTML = document.getElementById(divId).innerHTML;

	addHeader = '<table style="width:' + width + 'px" class="floatingHeader">' +
	            '<tr><td ondblclick="void(0);" onmouseover="over=true;" onmouseout="over=false;" style="cursor:move;height:18px">' + title + '</td>' +
	            '<td style="width:18px" align="right"><a style="color:white;" href="javascript:hiddenFloatingDiv(\'' + divId + '\');void(0);">' +
	            '<b>[X]</b></a></td></tr></table>';

    // add to your div an header
	document.getElementById(divId).innerHTML = addHeader + originalDivHTML;

	document.getElementById(divId).className = 'dimming';
	document.getElementById(divId).style.display = "block";
    document.getElementById(divId).style.visibility = "visible";
}
function hiddenFloatingDiv(divId)
{
	document.getElementById(divId).innerHTML = originalDivHTML;
	document.getElementById(divId).style.visibility = 'hidden';
	document.getElementById(divId).style.display='none';
	document.getElementById('dimmer').style.visibility = 'hidden';
	document.getElementById('dimmer').style.display = 'none';

	DivID = "";
}
function MouseDown(e)
{
    if (over)
    {
        if (isMozilla) {
            objDiv = document.getElementById(DivID);
            X = e.layerX;
            Y = e.layerY;
            return false;
        }
        else {
            objDiv = document.getElementById(DivID);
            objDiv = objDiv.style;
            X = event.offsetX;
            Y = event.offsetY;
        }
    }
}
function MouseMove(e)
{
    if (objDiv) {
        if (isMozilla) {
            objDiv.style.top = (e.pageY-Y) + 'px';
            objDiv.style.left = (e.pageX-X) + 'px';
            return false;
        }
        else
        {
            objDiv.pixelLeft = event.clientX-X + document.body.scrollLeft;
            objDiv.pixelTop = event.clientY-Y + document.body.scrollTop;
            return false;
        }
    }
}
function MouseUp()
{
    objDiv = null;
}
function init()
{
    // check browser
    isMozilla = (document.all) ? 0 : 1;

    if (isMozilla)
    {
        document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
    }

    document.onmousedown = MouseDown;
    document.onmousemove = MouseMove;
    document.onmouseup = MouseUp;

    // add the div
    // used to dim the page
	buildDimmerDiv();
}

// call init
init();