手机号码验证

function isMibile(s) { 
		var flg=false;
		var field13=/^13\d{9}$/g;
		var field15=/^15[0,1,3,5,6,7,8,9]\d{8}$/g; 
		var field18=/^18[6,8,9]\d{8}$/g; 
		if((field13.exec(s)) || (field15.exec(s)) || (field18.exec(s))) {
			 flg=true; 
		} else {
			 flg=false; 
		} 
		return flg; 
	}