function DoCalBMR() {
	let txtAge;
	let txtHeight;
	let txtWeight;
	let mc1=141.327, mc2=1.039, mc3=3.038;
	let fc1=233.994, fc2=1.815, fc3=2.632;
	let rObj = document.getElementById("calRBMR");
	let mResult1, mResult2, fResult1, fResult2;
	
	txtAge = document.getElementById("txtAge").value;
	txtHeight = document.getElementById("txtHeight").value;
	txtWeight = document.getElementById("txtWeight").value;
	
	mResult1 = 5 + 13.7*txtWeight + 5*txtHeight - 6.8*txtAge;
	mResult2 = 10*txtWeight + 6.25*txtHeight - 5*txtAge + 5;
	fResult1 = 655 + 9.6*txtWeight + 1.8*txtHeight - 4.7*txtAge;
	fResult2 = 10*txtWeight + 6.25*txtHeight - 5*txtAge - 161;
	
	rObj.innerHTML = "<table><tr><td>&nbsp;</td> <td>公式一</td> <td>公式二</td></tr> <tr><td>男生</td><td>" + mResult1.toFixed() + "</td><td>" + mResult2.toFixed() + "</td></tr>  <tr><td>女生</td><td>" + fResult1.toFixed() + "</td><td>" + fResult2.toFixed() + "</td></tr></table>";
}