function initializeJavaScriptBenchmark( what ) {
	if( !document.timeStamps )
		document.timeStamps = []
	if( !document.timeStamps[ what ] )
		document.timeStamps[ what ] = [ 0, 0, 0, 0 ]
	document.timeStamps[ what ][ 0 ] -= (new Date()).valueOf()+0*(document.timeStamps[ what ][ 3 ]=1)
}

function updateJavaScriptBenchmark( what ) {
  return ( !document.timeStamps || !document.timeStamps[ what ]  || !document.timeStamps[ what ][3] )?-1:document.timeStamps[ what ][ 2 ] = Math.round( 100*(document.timeStamps[ what ][ 0 ] += (new Date()).valueOf() ) / ++document.timeStamps[ what ][ 1 ] )/100+(document.timeStamps[ what ][ 3 ]=0)
}

function javaScriptBenchmark( what, reportHandle ) {
	initializeJavaScriptBenchmark( what )
	eval( what )
	updateJavaScriptBenchmark( what )
	var report = ""
	for( currentWhat in document.timeStamps )
		report += document.timeStamps[ currentWhat ][ 1 ]?currentWhat +"\n________________________________________\ntook in average ~"+ document.timeStamps[ currentWhat ][ 2 ] +"ms after "+ document.timeStamps[ currentWhat ][ 1 ] +" execution(s)\n\n\n":""
	!reportHandle?alert( report ):reportHandle.innerHTML = report.replace( /\n________________________________________\n/g, "<hr/>" ).replace( /\t/g, "&nbsp; &nbsp; &nbsp;" ).replace( /\n/g, "<br/>" )
}