<script language="JAVASCRIPT"> function ClearForm(form){ form.weight.value = ""; form.height.value = ""; form.bmi.value = ""; form.my_comment.value = ""; } function bmi(weight, height) { bmindx=weight/eval(height*height); return bmindx; } function checkform(form) { if (form.weight.value==null||form.weight.value.length==0 || form.height.value==null||form.height.value.length==0){ alert("\n請輸入你的身高體重好嗎?"); return false; } else if (parseFloat(form.height.value) <= 40|| parseFloat(form.height.value) >=300|| parseFloat(form.weight.value) <=10|| parseFloat(form.weight.value) >=250){ alert("\n不要鬧了啦!你是怪物啊! \n再鬧.小心我扁你!"); ClearForm(form); return false; } return true; } function computeform(form) { if (checkform(form)) { yourbmi=Math.round(bmi(form.weight.value, form.height.value/100)); form.bmi.value=yourbmi; if (yourbmi >40) { form.my_comment.value="恐龍?,快去看醫生!"; } else if (yourbmi >30 && yourbmi <=40) { form.my_comment.value="嗯...或許日本的相撲適合你,我也不知該說甚麼了?"; } else if (yourbmi >27 && yourbmi <=30) { form.my_comment.value="你很重喔,早晨跑2000公尺,睡前做500個伏地挺身!!"; } else if (yourbmi >22 && yourbmi <=27) { form.my_comment.value="超出標準了,多運動,控制一下飲食吧.祝福你!"; } else if (yourbmi >=21 && yourbmi <=22) { form.my_comment.value="真羨慕你.繼續保持下去!最佳女(男)主角換你做做看!!"; } else if (yourbmi >=18 && yourbmi <21) { form.my_comment.value="未達標準體重,多吃點對你才有好處.加油!"; } else if (yourbmi >=16 && yourbmi <18) { form.my_comment.value="哇!小心餓死.快去吃些高熱量的食物!"; } else if (yourbmi <16) { form.my_comment.value="皮包骨了,建議你去掛急診並長期住院 "; } } return; } </script> <form method="POST" name="BMI"> <p><font size="1">身高(公分) <input type="text" size="5" name="height" onfocus="this.form.height.value=''"><br> 體重(公斤) <input type="text" size="5" name="weight" onfocus="this.form.weight.value=''"> <input type="button" value="開始診斷" onclick="computeform(this.form)"><br> 指數 <input type="text" size="5" name="bmi"><br> 診斷結果 <input type="text" size="45" name="my_comment"> </p> </form>