function addThis()
{
var version=parseFloat(navigator.appVersion);
if ((navigator.appName=="Microsoft Internet Explorer") && (version<=6))
{
return;
}
else {
document.write('<' + 'script');
document.write(' type="text/javascript"');
document.write(' src="' + 'http://s7.addthis.com/js/250/addthis_widget.js#username=xa-4b8c86bc31e0e307' + '">');
document.write('</' + 'script' + '>');
}
}