is_present.js

function isTransactionTrackingPresent(symbol)
{
	symbol = symbol || 'trackTrans';
	var present = false;
	var script_tags = document.getElementsByTagName("script");
	Array.prototype.slice.call(script_tags).forEach( function(tag)
	{
		if ( present ) return;
		var source = tag.innerText || tag.textContent;
		if ( source && source.indexOf(symbol) != -1 )
			present = true;
	});
	return present;
}