<script>
		var myh = 1.76 ;
		var myw = 68.0;
		var mybmi = myw / myh / myh; 
		document.write("有人身高: " + myh   + "<br />");
		document.write("有人體重: " + myw   + "<br />");
		document.write("計算BMI : " + mybmi + "<br />");
	</script>