用JavaScript写猜数字游戏?

JavaScript017

用JavaScript写猜数字游戏?,第1张

document.write("<input type='text' id='inval' name='inval'/>") //数字框

document.write("<input type='button' onclick='Guess()' value='提交'>")//按钮

function Guess() {

var inputVal=document.getElementById("inval").value //获取文本框的值

var curRand=parseInt(100*Math.random()) //获取随机数

if(!isNum(inputVal))

{

alert("不是数字,请重新输入")

return

}

if(inputVal){

if(inputVal>curRand){

alert("胜利")

} else if (inputVal<curRand){

alert("输了")

} else {

alert("平局")

}

}

}

//判断是否是数字,true表示是数字

function isNum(value) {

return !isNaN(value)

}

<HTML>

<HEAD>

<SCRIPT LANGUAGE="JavaScript">

var js_mult1=3141

var js_mult2=5821

var js_m1=100000000

var js_m2=10000

var js_iseed=0

var js_iseed1=0

var js_iseed2=0

function random(n)

{

if (js_iseed == 0)

{

now = new Date()

js_iseed = now.getHours() + now.getMinutes() * 60

+ now.getSeconds() * 3600

}

js_iseed1 = js_iseed / js_m2

js_iseed2 = js_iseed % js_m2

var tmp = (((js_iseed2 * js_mult1 + js_iseed1 * js_mult2) % js_m2) *

js_m2 + (js_iseed2 * js_mult2)) % js_m1

js_iseed = (tmp + 1) % js_m1

return (Math.floor((js_iseed/js_m1) * n))

}

var myNumber = 0

var nGuesses = 0

function guessnum()

{

var response

var num = parseInt(document.forms[0].guess.value)

document.forms[0].guess.value = num // visual feedback in case of NaN

nGuesses++ // increase the guess count

response = "你猜的数字"

if (num <myNumber)response = response + "小了"

if (num >myNumber)response = response + "大了"

if (num == myNumber)

{

response = response + "猜对了!! 继续下一个数字吧."

nGuesses = 0

myNumber = random(100)+1

}

document.forms[1].result.value=response

document.forms[1].guesses.value=nGuesses

document.forms[0].guess.focus()

document.forms[0].guess.select()

return true

}

function giveup()

{

var response

nGuesses = 0

response = "这个数字是 " + myNumber +"。别灰心,猜下一个数字吧"

myNumber = random(100)+1

document.forms[1].result.value=response

document.forms[1].guesses.value=nGuesses

document.forms[0].guess.focus()

document.forms[0].guess.select()

}

</SCRIPT></HEAD>

<BODY bgcolor="ffffff" onLoad="document.forms[0].guess.focus()document.forms[0].guess.select()">

<center>

<H2>猜数字游戏</H2><p><font size="2"><b>数字是1-100内的数字,随机显示,猜猜看</b></font><p>

<SCRIPT>

myNumber = random(100)+1

nGuesses = 0

</SCRIPT>

<FORM onSubmit="guessnum()return false">

你猜的数字是: <INPUT TYPE="text" NAME="guess" SIZE=5>

<INPUT TYPE="button" VALUE=" 猜猜... " onClick="guessnum()">

<INPUT TYPE="button" VALUE=" 放弃 " onClick="giveup()">

</FORM>

<FORM><PRE>

次数: <INPUT TYPE="text" NAME="guesses" SIZE=3>

信息提示: <INPUT TYPE="text" NAME="result" SIZE=44>

</PRE></FORM>