if (/MSIE (\d+\.\d+);/.test(navigator.userAgent))
{ //test for MSIE x.x;
	var ieversion=new Number(RegExp.$1) // capture x.x portion and store as a number
	if (ieversion<7) document.getElementById('browser_check').style.display = 'block';
}

function close_browser_check()
{
	document.getElementById('browser_check').style.display = 'none';
}