var userAgent = navigator.userAgent.toLowerCase();
var internetExplorer = false;
var safari = false;
var firefox = false;


if ( userAgent.indexOf("firefox") != -1 )
	firefox = true;
else if ( userAgent.indexOf("safari") != -1 )
	safari = true;
else if ( userAgent.indexOf("msie") != -1 )
	internetExplorer = true;


function autoTab( event, maxLength )
{
	var keyCode = event.keyCode;
	
	
	if ( event.target != null )
		var element = event.target;
	else
		var element = event.srcElement;
	
	
	var form = element.form;
	

	if ( keyCode != 0 && keyCode != 8 && keyCode != 9 && keyCode != 28 && keyCode != 29 && keyCode != 30 && keyCode != 31 && keyCode != 127 )
	{
		if ( element.value.length == maxLength )
		{
			var tab = false;
			for ( var a = 0; a < form.elements.length; a++ )
			{
				if ( tab == true )
				{
					form.elements[a].focus();
					break;
				}
				
				if ( element == form.elements[a] )
					tab = true;
			}
		}
	}
}

function filterKey( event, filterLetters, filterNumbers, filterSpecials )
{
	var keyCode = event.keyCode;
	
	var letterKeyCodes = [65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90];
	var numberKeyCodes = [48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 109, 188, 189, 190];
	var specialKeyCodes = [46, 106, 107, 111, 186, 187, 191, 192, 219, 220, 221, 222, 255];
	
	
	if ( filterLetters == true )
	{
		for ( var a = 0; a < letterKeyCodes.length; a++ )
		{
			if ( letterKeyCodes[a] == keyCode )
				return false;
		}
	}
	
	if ( filterNumbers == true || (filterNumbers == false && (event.altKey == true || event.ctrlKey == true || event.shiftKey == true)) )
	{
		for ( var a = 0; a < numberKeyCodes.length; a++ )
		{
			if ( numberKeyCodes[a] == keyCode )
				return false;
		}
	}
	
	if ( filterSpecials == true )
	{
		for ( var a = 0; a < specialKeyCodes.length; a++ )
		{
			if ( specialKeyCodes[a] == keyCode )
				return false;
		}
	}
	
	return true;
}

function setWindowStatus( string )
{
	window.status = string;
	
	return true;
}

function clearWindowStatus()
{
	window.status = "";
	
	return true;
}

function openDetailsWindow( obj_id, obj_type )
{
	open("object_details.php?obj_id=" + obj_id + "&obj_type=" + obj_type, "detailsWindow", "height=350, width=600, status=yes, scrollbars=yes, resizable=yes");
}

function openFilterWindow( obj_type )
{
	open("object_filter.php?obj_type=" + obj_type, "filterWindow", "height=350, width=600, status=yes, scrollbars=yes, resizable=yes");
}

function browseFileSystem( form_input )
{
	open("browse_file_system.php?form_input=" + form_input, "browseWindow", "height=300, width=600, status=yes, scrollbars=yes, resizable=yes");
}
			
function clearFile( field_name )
{
	document.pso_form[field_name + "_id"].value = "";
	document.getElementById(field_name + "_information").innerHTML = "";
	document.getElementById(field_name + "_clear").innerHTML = "";
}