AceJS.com > Script number: 113004

The Script

Enter your details (you can choose Imperial or Metric units). But remember this information is only a guide and it's aimed at healthy adults. It isn't suitable for children, young people or older people.

The Source

<HTML>
<HEAD><TITLE>Free Scripts And Tools For Webmasters @ www.AceJS.com</TITLE>
</HEAD>
<BODY>
<SCRIPT language=javascript type="text/javascript">
<!-- ;
var h_imperial = 1; //flags for input modes
var w_imperial = 1;
var pounds_to_kgs = 2.204623;
var inches_to_meters = 39.4
var h_ft, h_ins, h_m, h_cms;
var w_st, w_pds, w_kgs;
var h,w, w1;
var weight_in_pounds;

function dispnum(x) {
	x = Math.floor(x*10)/10; // rounded off to two decimal places
	return(x);
}

function clearvalues(){ // clears all the contents of the form

document.data.height_feet.value=''
	document.data.height_inches.value=''
	document.data.height_meters.value=''
	document.data.height_cms.value=''
	document.data.weight_stones.value=''
	document.data.weight_pounds.value=''
	document.data.weight_kgs.value=''
	document.data.bmi.value=''
	document.data.expl.value=''
	document.data.max_stones.value=''
	document.data.max_pounds.value=''
	document.data.max_kgs.value=''
}

function initialise() { // initialise the variables

if (document.data.height_feet.value == '') {
		document.data.height_feet.value = 0;
	}
	if (document.data.height_inches.value == '') {
		document.data.height_inches.value = 0;
	}
	if (document.data.height_meters.value == '') {
		document.data.height_meters.value = 0;
	}
	if (document.data.height_cms.value == '') {
		document.data.height_cms.value = 0;
	}
	if (document.data.weight_stones.value == '') {
		document.data.weight_stones.value = 0;
	}
	if (document.data.weight_pounds.value == '') {
		document.data.weight_pounds.value = 0;
	}
	if (document.data.weight_kgs.value == '') {
		document.data.weight_kgs.value = 0;
	}
}

function compute() { // the main routine

initialise();

h_ft = parseFloat(document.data.height_feet.value);
	h_ins = parseFloat(document.data.height_inches.value);
	h_m = parseFloat(document.data.height_meters.value);
	h_cms = parseFloat(document.data.height_cms.value);

if (h_imperial) {
		h = ((h_ft*12)+h_ins)
		h /= inches_to_meters; }	// convert inches to metres
	else {
		h = ((h_m*100)+h_cms)/100;
	}

if (h <= 1.22) {
		alert(dispnum(h)+" Metres seems to be too short\n\nPlease try again.");
	}

if (h >= 2.13) {
		alert(dispnum(h)+" Metres seems to be too tall\n\nPlease try again.");
	}

w_st = parseFloat(document.data.weight_stones.value);
	w_pds = parseFloat(document.data.weight_pounds.value);
	w_kgs = parseFloat(document.data.weight_kgs.value);

if (w_imperial) {
		w = ((w_st*14)+w_pds);
		w1 = w;
		w /= pounds_to_kgs;} // pounds to kgs }
	else {
		w=w_kgs;
	}

if (w <= 25) {
		alert(dispnum(w)+" Kgs? Thats much too light\n\nPlease try again.");
	}

if (w >= 227) {
		alert(dispnum(w)+" Kgs? Thats much too heavy\n\nPlease try again.");
	}

bmi = w / (h*h);

max_kgs = 25*h*h;
	weight_in_pounds = (max_kgs*2.2);

document.data.bmi.value = dispnum(bmi);
	if (bmi < 20 )
		document.data.expl.value = "Underweight - you may need to put weight on";
	if (bmi >= 20 && bmi <= 25 )
		document.data.expl.value = "OK - ideal weight range, try to maintain";
	if (bmi > 25 && bmi <= 30 )
		document.data.expl.value = "Overweight - make sure your weight doesn't rise";
	if (bmi > 30 )
		document.data.expl.value = "Obese - important to lose weight";

max_imperial = (weight_in_pounds/14)*10;

max_imperial = Math.round(max_imperial);
max_imperial = max_imperial/10;

document.data.max_stones.value = Math.floor(max_imperial);

temp1 = max_imperial - (Math.floor(max_imperial));

temp1 = Math.round(temp1*10);
document.data.max_pounds.value = Math.round(temp1*1.4);

document.data.max_kgs.value = dispnum(max_kgs);

}
// -->
</SCRIPT>
      </p>

<TABLE align=center border=5 bordercolordark="#330000" bordercolorlight="#cc6633" cellPadding=0 width=600>
<tr><td BGCOLOR="#FFCC99">
<CENTER>
<br><FONT size=3 face="Frutiger 57Cn"><b>Step 1 - Enter your height and weight<br>
then click on imperial or metric<BR> </b></FONT>
<TABLE align=left border=0 cellPadding=5 width="100%">
<TBODY>
<TR><TD WIDTH="10%" VALIGN="TOP">
    <FONT size=2 face="Arial"><b> Height:</b></FONT></TD>
	<TD WIDTH="48%" VALIGN="TOP">
	<INPUT maxLength=1 name=height_feet size=1><FONT size=2 face="Arial"> feet</FONT>
    <INPUT maxLength=2 name=height_inches size=2><FONT size=2 face="Arial"> inches
	                    
	 <u><b>OR</b></u></FONT>
    <BR>
	<INPUT CHECKED name=h_units onclick="h_imperial = 1;" type=radio> <FONT size=2 face="Arial">
	  Imperial</FONT></TD>
<TD WIDTH="42%" VALIGN="TOP">
	<INPUT maxLength=1 name=height_meters size=1><FONT size=2 face="Arial"> metres</FONT> 
    <INPUT maxLength=3 name=height_cms size=3><FONT size=2 face="Arial"> cms </FONT>
    <BR>
	<INPUT name=h_units onclick="h_imperial = 0;" type=radio><FONT size=2 face="Arial">
	  Metric</FONT>
	</TD>
</TR>

<TR><TD WIDTH="15%" VALIGN="TOP">
    <FONT size=2 face="Arial"><b> Weight:</b></FONT></TD>
	<TD WIDTH="43%" VALIGN="TOP">
    <INPUT maxLength=2 name=weight_stones size=2><FONT size=2 face="Arial"> stone</FONT>
    <INPUT maxLength=3 name=weight_pounds size=3><FONT size=2 face="Arial"> pounds
	             <u><b>OR</b></u></FONT>
	<br>
	<INPUT CHECKED name=w_units onclick="w_imperial = 1;" type=radio><FONT size=2 face="Arial">Imperial</FONT></TD>
<TD WIDTH="42%" VALIGN="TOP">
	<INPUT maxLength=3 name=weight_kgs size=3><FONT size=2 face="Arial"> kgs</FONT>
	<BR>
	<INPUT name=w_units onclick="w_imperial = 0;" type=radio><FONT size=2 face="Arial">
	  Metric</FONT>
	</TD>
	</TR>
</TBODY>
</TABLE>
</CENTER>

<P align=center><BR></P>
<DIV align=center>
<CENTER>
<BR><BR><BR><BR><BR>
<FONT size=3 face="Frutiger 57Cn"><b>Step 2 - Click to:</b>  
<INPUT onclick="compute(this.form)" type=button value="Compute Body Mass Index" STYLE="font: 10pt Arial Black;
color:#FFFFFF; background:#330000">
<BR> </FONT>
<TABLE align=center border=0 cellPadding=5 width="100%">
  <TBODY>
  <TR>
    <TD align=left><FONT size=2 face="Arial"><B> Your Body Mass Index </B></FONT></TD>
    <TD align=left><INPUT maxLength=256 name=bmi size=7> </TD></TR>
  <TR>
    <TD align=left><FONT size=2 face="Arial"><B> What this means</B></FONT></TD>
    <TD align=left><TEXTAREA name=expl rows=2 cols=26>

<!-- WARNING DELETE THIS LINE FOR THE SCRIPT TO WORK, NOT THE BELLOW LINE, THIS ONE

WARNING DELETE THIS LINE AS WELL --> Your Maximum Healthy Weight
(Based on a
Body Mass Index of 25) stone pounds
kgs

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