document.onkeydown=keydown;

function keydown(e)
{
	var key;
	if (window.event)
	{
		key = window.event.keyCode;
	}
	else
	{
		if (e)
			key = e.which;
	}

	if(key == 13)	// enter key
	{
	}
}

// DOM
function obj(objName)
{
	return document.getElementById(objName);
}

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

function bIsNumeric(sText)
{
	var bRet = true;

	for(var i=0; i < sText.length; i++)
	{
		if(sText.charAt(i) > "9" || sText.charAt(i) <"0")
		{
			bRet = false;
			break;
		}	
	}		

	return bRet;
}

function sleep(nMilliseconds) 
{
	var now = new Date();
	var exitTime = now.getTime() + nMilliseconds;
	while (true) 
	{
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}