HTML point - Javascript - Il tuo peso forma

Il tuo peso forma

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<HEAD>

<SCRIPT LANGUAGE="JavaScript">
<!--

// Copyright 1996 - Tomer and Yehuda Shiran
// This example will appear in our forthcoming book on JavaScript.
// This example is NOT public domain.

// Returns the height percentage (50% is
// average...), according to the given
// sex, age, and actual height in cm
/////////////////////////////////////////

function getHeight(sex, age, height) {
	height = Math.round(height)
	var height5 = 0
	var height50 = 0
	if (age == 2) {
		height50 = 87
		height5 = 82
	} else
	if (age == 3) {
		height50 = 95
		height5 = 90
	} else
	if (age == 4) {
		height50 = 102
		height5 = 95
	} else 
	if (age == 5) {
		height50 = 109
		height5 = 101
	} else 
	if (age == 6) {
		height50 = 114
		height5 = 107
	} else 
	if (age == 7) {
		height50 = 120
		height5 = 112
	} else 
	if (age == 8) {
		height50 = 126
		height5 = 118
	} else 
	if (age == 9) {
		height50 = 131
		height5 = 121
	} else 
	if (age == 10) {
		height50 = 137
		height5 = 127
	} else 
	if (age == 11) {
		height50 = 143
		height5 = 131
	} else
	if (sex == "f") {
		if (age == 12) {
			height50 = 150
			height5 = 140
		} else 
		if (age == 13) {
			height50 = 157
			height5 = 145
		} else 
		if (age == 14) {
			height50 = 160
			height5 = 148
		} else 
		if (age == 15) {
			height50 = 162
			height5 = 150
		} else 
		if (age == 16) {
			height50 = 162
			height5 = 151
		} else 
		if (age == 17) {
			height50 = 163
			height5 = 153
		} else 
		if (age == 18) {
			height50 = 164
			height5 = 154
		}
	} else
	if (age == 12) {
		height50 = 150
		height5 = 137
	} else 
	if (age == 13) {
		height50 = 156
		height5 = 142
	} else 
	if (age == 14) {
		height50 = 162
		height5 = 148
	} else 
	if (age == 15) {
		height50 = 168
		height5 = 155
	} else 
	if (age == 16) {
		height50 = 174
		height5 = 160
	} else 
	if (age == 17) {
		height50 = 175
		height5 = 165
	} else 
	if (age == 18) {
		height50 = 176
		height5 = 165
	}
	var percent = (height - height5) * (50 - 5) / (height50 - height5) + 5
	return percent
}

// Returns the weight percentage (50% is
// average...), according to the given
// sex, age, and actual weight in kg
/////////////////////////////////////////

function getWeight(sex, age, weight) {
	weight = Math.round(weight)
	var weight5 = 0
	var weight50 = 0
	if (age == 2) {
		weight50 = 12
		weight5 = 10
	} else
	if (age == 3) {
		weight50 =14
		weight5 = 12
	} else
	if (age == 4) {
		weight50 = 16
		weight5 = 14
	} else 
	if (age == 5) {
		weight50 = 18
		weight5 = 15
	} else 
	if (age == 6) {
		weight50 = 20
		weight5 = 17
	} else 
	if (age == 7) {
		weight50 = 22
		weight5 = 18
	} else 
	if (age == 8) {
		weight50 = 25
		weight5 = 20
	} else 
	if (age == 9) {
		weight50 = 29
		weight5 = 22
	} else 
	if (sex == "f") {
		if (age == 10) {
			weight50 = 32
			weight5 = 25
		} else
		if (age == 11) {
			weight50 = 37
			weight5 = 27
		} else
		if (age == 12) {
			weight50 = 41
			weight5 = 30
		} else 
		if (age == 13) {
			weight50 = 46
			weight5 = 34
		} else 
		if (age == 14) {
			weight50 = 50
			weight5 = 38
		} else 
		if (age == 15) {
			weight50 = 53
			weight5 = 40
		} else 
		if (age == 16) {
			weight50 = 56
			weight5 = 43
		} else 
		if (age == 17) {
			weight50 = 57
			weight5 = 45
		} else 
		if (age == 18) {
			weight50 = 57
			weight5 = 46
		}
	} else
	if (age == 10) {
		weight50 = 24
		weight5 = 31
	} else 
	if (age == 11) {
		weight50 = 35
		weight5 = 27
	} else
	if (age == 12) {
		weight50 = 40
		weight5 = 30
	} else 
	if (age == 13) {
		weight50 = 46
		weight5 = 35
	} else 
	if (age == 14) {
		weight50 = 51
		weight5 = 38
	} else 
	if (age == 15) {
		weight50 = 57 
		weight5 = 44
	} else 
	if (age == 16) {
		weight50 = 62
		weight5 = 48
	} else 
	if (age == 17) {
		weight50 = 67
		weight5 = 53
	} else 
	if (age == 18) {
		weight50 = 69
		weight5 = 55
	}
	var percent = (weight - weight5) * (50 - 5) / (weight50 - weight5) + 5
	return percent
}

// Creates a comment according to the 
// height, weight, age, sex, and a 
// computed overall caculation. Also
// displays a disclaimer. It optionally
// displays the "scientific" results
/////////////////////////////////////////

function printResult(height, weight, sex, age) {
	var heightAdj = ""
	var weightAdj = ""
	var ageAdj = ""
	var sexAdj = ""
	var gradeAdj = ""
	var grade = 0
	var propWeight = weight / height
	if (height > 70) { 
		heightAdj = "tall"
		grade += 2
	} else
		if (height < 30) {
			heightAdj = "short"
			grade += 1
		} else {
			heightAdj = "medium-height"
			grade += 3
		}
	if (propWeight > 2) {
		weightAdj = "over-weight"
		grade += 1
	} else
		if (propWeight < 0.5) {
			weightAdj = "slim"
			grade += 2
		} else {
			weightAdj = "medium-weight"
			grade += 3
		}
	ageAdj = ageInput + "-year old"
	if (grade >= 5)
		gradeAdj = "great-looking"
	else
		if (grade <= 2)
			gradeAdj = "ackward-looking"
		else
			gradeAdj = "fine-looking"
	sexAdj = (sex == "f") ? "female" : "male"
	var finalMessage = "You are a " + heightAdj + ", "
	finalMessage += weightAdj + ", " + gradeAdj + " "
	finalMessage += ageAdj + " " + sexAdj + "."
	alert(finalMessage)
	if (confirm("Are you interested in scientific results?")) {
		scMessage = "height = " + Math.round(height)
		scMessage +="%\rweight = " + Math.round(weight)
		scMessage += "%\rweight/height = " + propWeight
		alert(scMessage)
	} else
		if (grade <= 4)
			alert("Good idea!")
	var notice = "Thank you for using the JavaScript weight "
	notice += "and height calculator. All calculations are "
	notice += "done according to the child-development graph "
	notice += "in \"Compton's Encyclopedia\". We appologize "
	notice += "if you were insulted by the comments -- that "
	notice += "was not our intention. We used them to demonstrate "
	notice += "various JavaScript scripting techniques."
	alert(notice)
}

// converts weight and height from 
// english system to metric system.
/////////////////////////////////////////

function convertInput() {
	weightInput *= 0.45359
	heightInput *= 2.54
}

// Global statements to receive input
// and call functions
/////////////////////////////////////////

var sex = prompt("Qual è il tuo sesso ((m)aschile o (f)emminile):", "")
var ageInput = parseInt(prompt("Qual è la tua età (minimo = 2):", ""))
ageInput = Math.round(ageInput)
var systemMessage = "Vuoi usare il sitema (m)etrico decimale o "
systemMessage += "quello ingl(e)se?"
var system = prompt(systemMessage, "m")
var heightUnit = (system == "m") ? "centimetri" : "pollici" 
var weightUnit = (system == "m") ? "Kilogrammi" : "pounds"
var heightInput = prompt("Inserisci il tuo peso in " + heightUnit + ":", "")
heightInput = parseInt(heightInput)
var weightInput = prompt("Inserisci il tuo peso in " + weightUnit + ":", "")
weightInput = parseInt(weightInput)
if (system == "e")
	convertInput()
if (ageInput > 18)
		var age = 18
	else
		if (ageInput < 2)
			var age = 2
		else
		var age = ageInput
var heightPer = getHeight(sex, age, heightInput)
var weightPer = getWeight(sex, age, weightInput)
heightPer = (heightPer < 1) ? 1 : heightPer
heightPer = (heightPer > 99) ? 99 : heightPer
weightPer = (weightPer < 1) ? 1 : weightPer
weightPer = (weightPer > 99) ? 99 : weightPer
printResult(heightPer, weightPer, sex, age)

// -->
</SCRIPT>

</HEAD>

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