var re = 505899.24- 495991.61- 9907.63;
	var test1 = /\d(?:.(\d*))?e([+-]\d+)/.test(re);
	alert("是否是科学计算结果:"+test1);
	var test2 = re.toFixed(10)-0;
	alert("处理后的结果："+ test2 );