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) <FORM NAME="BMI" method=POST> <TABLE border=1> <TR> <TD><DIV ALIGN=CENTER>Your Weight (kg)</DIV></TD> <TD><DIV ALIGN=CENTER>Your Height (cm)</DIV></TD> <TD><DIV ALIGN=CENTER>Your BMI</DIV></TD> <TD><DIV ALIGN=CENTER>My Comment</DIV></TD> </TR> <TR> <TD><INPUT TYPE=TEXT NAME=weight SIZE=10 onFocus="this.form.weight.value=''"></TD> <TD><INPUT TYPE=TEXT NAME=height SIZE=10 onFocus="this.form.height.value=''"></TD> <TD><INPUT TYPE=TEXT NAME=bmi SIZE=8 ></TD> <TD><INPUT TYPE=TEXT NAME=my_comment size=35></TD> </TABLE> <P> <INPUT TYPE="button" VALUE="Let's see" onClick="computeform(this.form)"> <INPUT TYPE="reset" VALUE="Reset" onClick="ClearForm(this.form)"> </FORM> <HR> <B>Disclaimer</B>: This form is based on the calculation of <A HREF="http://phaster.com/unpretentious/bmi.html"><I>"Body Mass Index"</I></A> 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. <p>This free script provided by <a href="http://javascriptkit.com">JavaScript Kit</a></p> <hr> <SCRIPT LANGUAGE="JAVASCRIPT"> <!-- hide this script tag's contents from old browsers //Body Mass calculator- by John Scott (johnscott03@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) <= 0|| parseFloat(form.height.value) >=500|| parseFloat(form.weight.value) <= 0|| 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 <=40) { form.my_comment.value="Umm... You are obese, want some liposuction?"; } else if (yourbmi >27 && yourbmi <=30) { form.my_comment.value="You are very fat, do something before it's too late"; } else if (yourbmi >22 && yourbmi <=27) { form.my_comment.value="You are fat, need dieting and exercise"; } else if (yourbmi >=21 && yourbmi <=22) { form.my_comment.value="I envy you. Keep it up!!"; } else if (yourbmi >=18 && yourbmi <21) { form.my_comment.value="You are thin, eat more."; } else if (yourbmi >=16 && yourbmi <18) { form.my_comment.value="You are starving. Go Find some food!"; } else if (yourbmi <16) { form.my_comment.value="You're grossly undernourished, need hospitalization "; } } return; } // -- done hiding from old browsers --> </SCRIPT>