[Mx] come elimino i numeri dopo la virgola...

[andr3a]

function createNumber( str, float ) {
	str = str.split( '.' );
	if( str[1] != undefined ) {
		str[1] = str[1].substr( 0, float );
	}
	return Number( str.join( '.' ) );
}

trace( createNumber( "1.154578855", 3 ) ); // 1.154