健康换算 Body Mass

2007-05-28

Enter your weight in kilograms and your height in centimeters in the form below and press the “Let’s see” button (Please read disclaimer below before using this form)

Disclaimer: This form is based on the calculation of
“Body Mass Index“
and is only meant to be a demonstration of how Javascript(tm) could be used
on a Web Page. Information it contains may not be accurate and is not designed
or intended to serve as medical advice. I am not liable for any physical or
psychological damages suffered as a result of using this script.

<!– hide this script tag’s contents from old browsers

//Body Mass calculator- by John Scott ( johnscott03 at yahoo.com)
//Visit JavaScript Kit http://javascriptkit.com) for script
//Credit must stay intact for use

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(”\nPlease complete the form first”);
return false;
}

else if (parseFloat(form.height.value) =500||
parseFloat(form.weight.value) =500){
alert(”\nReally know what you’re doing? \nPlease enter values again. \nWeight in kilos and \nheight in cm”);
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=”You are grossly obese, consult your physician!”;
}

else if (yourbmi >30 && yourbmi 27 && yourbmi 22 && yourbmi =21 && yourbmi =18 && yourbmi =16 && yourbmi <18) {
form.my_comment.value=”You are starving. Go Find some food!”;
}

else if (yourbmi

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