/*
    Copyright (c) 2006, SpatialPoint, LLC.
    
    All rights reserved.
    
    http://www.spatialpoint.com
*/

function hideControl(id)
{
    var obj = document.getElementById(id);
    if (obj != null)
    {
        obj.style.visibility = "hidden";
        obj.style.display = "none";
    }
}

function showControl(id)
{
    var obj = document.getElementById(id);
    
    if (obj != null)
    {
        obj.style.visibility = "visible";
        obj.style.display = "block";
    }
}

function toggleDisplay(id)
{
    var obj = document.getElementById(id);
    
    if (obj.style.visibility == "hidden")
    {
        obj.style.visibility = "visible";
        obj.style.display = "block";
    }
    else
    {
        obj.style.visibility = "hidden";
        obj.style.display = "none";
    }
}

function trim(text)
{
   return text.replace(/^\s*|\s*$/g, "");
}

function isKeyPressed(evt, code)
{
	// this function supports IE, Netscape, and FireFox
	evt = (evt) ? evt : (window.event) ? event : null;
  
	if (evt)
	{
		var charCode = (evt.charCode) ? evt.charCode :
			((evt.keyCode) ? evt.keyCode : ((evt.which) ? evt.which : 0));

		return (charCode == code);
	}
	
	return false;
}