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用&#106avascript实现一些随机事件

王朝html/css/js·作者佚名  2006-11-24
窄屏简体版  字體: |||超大  

1、随机广告

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin

var how_many_ads = 3;

var now = new Date()

var sec = now.getSeconds()

var ad = sec % how_many_ads;

ad +=1;

if (ad==1) {

txt="The World's Largest Online Bookstore, Amazon.com";

url="http://www.amazon.com";

alt="amazon.com";

banner="http://imageserv.imgis.com/images/Ad12669St1Sz1Sq1_Ban1.gif";

width="468";

height="60";

}

if (ad==2) {

txt="Palm III by 3Com, in stock!";

url="http://cybershop.com/";

alt="cybershop.com";

banner="http://imageserv.imgis.com/images/Ad13189St1Sz1Sq5_Ban10.gif";

width="468";

height="60";

}

if (ad==3) {

txt="Find it at GoTo.com";

url="http://www.goto.com";

alt="goto.com";

banner="http://imageserv.imgis.com/images/Ad13700St1Sz1Sq1_Ban1.gif";

width="468";

height="60";

}

document.write('<center>');

document.write('<a href=\"' + url + '\" target=\"_top\">');

document.write('<img src=\"' + banner + '\" width=')

document.write(width + ' height=' + height + ' ');

document.write('alt=\"' + alt + '\" border=0>

');

document.write('<small>' + txt + '</small></a>');

document.write('</center>');

// End -->

</SCRIPT>

2、随机背景颜色

<HTML>

<HEAD>

<TITLE>Random Background</TITLE>

<SCRIPT LANGUAGE="JavaScript">

<!--

function backcolor(form) {

temp = ""

for (var i = 0; i < 16; i++) {

temp = form.color[i].value

if (form.color[i].checked){ document.bgColor = temp }

}

}

function randombackground() {

document.bgColor = getColor()

}

function getColor(){

currentdate = new Date()

backgroundcolor = currentdate.getSeconds()

if (backgroundcolor > 44)

backgroundcolor = backgroundcolor - 45

else if (backgroundcolor > 29)

backgroundcolor = backgroundcolor - 30

else if (backgroundcolor > 15)

backgroundcolor = backgroundcolor - 16

if (backgroundcolor == 0 )

return "olive";

else if (backgroundcolor == 1 )

return "teal";

else if (backgroundcolor == 2 )

return "red";

else if (backgroundcolor == 3 )

return "blue";

else if (backgroundcolor == 4 )

return "maroon";

else if (backgroundcolor == 5 )

return "navy";

else if (backgroundcolor == 6 )

return "lime";

else if (backgroundcolor == 7 )

return "fuschia";

else if (backgroundcolor == 8 )

return "green";

else if (backgroundcolor == 9 )

return "purple";

else if (backgroundcolor == 10 )

return "gray";

else if (backgroundcolor == 11 )

return "yellow";

else if (backgroundcolor == 12 )

return "aqua";

else if (backgroundcolor == 13 )

return "black";

else if (backgroundcolor == 14 )

return "white";

else if (backgroundcolor == 15 )

return "silver";

}

// End -->

</SCRIPT>

</HEAD>

<BODY BGCOLOR=#ffffff vlink=#0000ff>

<CENTER>

<FORM>

<input type="button" value="随机背景颜色" onClick="randombackground()">

</FORM>

</CENTER>

</body></html>

3、随机背景图案

<HTML>

<HEAD>

<TITLE>Random Images</TITLE>

<SCRIPT LANGUAGE="JavaScript">

today=new Date();

jran=today.getTime();

var number = 3;

var random_number="";

var image="";

var text_color="";

ia=9301;

ic=49297;

im=233280;

jran = (jran*ia+ic) % im;

random_number = Math.ceil( (jran/(im*1.0)) *number);

if (random_number==1) {

text_color="000000";

image="bg1.gif";

}

if (random_number==2) {

text_color="000000";

image="bg2.jpg";

}

if (random_number==3) {

text_color="000000";

image="bg3.gif";

}

// End -->

</SCRIPT>

</HEAD>

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin

document.open();

document.write("<BODY BACKGROUND='"+image+"' TEXT='"+text_color+"' vlink=#0000ff>");

document.write("<CENTER></CENTER>");

// End -->

</SCRIPT>

<FORM>

<INPUTTYPE="button" VALUE="ReloadPage" onClick="window.location='RandomBgImages.htm'">

</FORM>

<SCRIPT LANGUAGE="JavaScript">

<!-- Begin

document.write("<CENTER><FONT SIZE=-1 color=red>Background Image: ("+image+")</FONT></CENTER>");

// End -->

</SCRIPT>

</body></html>

4、随机图案

把以下代码放在<head></head>之间:

<script language="JavaScript">

a = 4

var slump = Math.random();

var talet = Math.round(slump * (a-1))+1;

function create() {

this.src = '

this.border = '

this.alt = '

}

b = new Array()

for(var i=1; i<=a; i++) { b[i] = new create() }

b[1].src= "reset.gif"

b[1].border = "0"

b[1].alt= "111"

b[2].src= "back.gif"

b[2].border = "0"

b[2].alt= "222"

b[3].src= "ie.gif"

b[3].border = "0"

b[3].alt= "333"

b[4].src= "netscape.gif"

b[4].border = "0"

b[4].alt= "444"

var visa = "";

visa += '<img src='+b[talet].src+' border="0"'+' alt='+b[talet].alt+'>';

</SCRIPT>

把以下代码放在HTML文件任意地方:

<script language="JavaScript">

<!-- Hide this script from old browsers --

document.write(visa)

// -->

</script>

5、随机播放MIDI音乐

把以下代码放在<head></head>之间:

<script language="JavaScript">

<!--Hide from non JavaScript browsers

am = 5

var ran = Math.random();

var talet = Math.round(ran * (am-1))+1;

function create() {

this.src = '

}

c = new Array()

for(var i=1; i<=am; i++) { c[i] = new create() }

c[1].src= "hh1.mid"

c[2].src= "hh2.mid"

c[3].src= "hh3.mid"

c[4].src= "hh4.mid"

c[5].src= "hh5.mid"

var vismid = "";

vismid += '<embed src='+c[talet].src+' width=0 height=0'+' autostart=true'+' loop=2'+'>';

//-->

</SCRIPT>

把以下代码放在<body></body>之间:

<script language="JavaScript">

<!--Hide from non JavaScript browsers

document.write(vismid);

//-->

</script>

6、随机文本

把以下代码放在<head></head>之间:

<script language="JavaScript">

<!-- Hide

var a = Math.random() + ""

var rand1 = a.charAt(5)

quotes = new Array

quotes[1] = "MESSAGE #1"

quotes[2] = "MESSAGE #2"

quotes[3] = "MESSAGE #3"

quotes[4] = "MESSAGE #4"

quotes[5] = "MESSAGE #5"

quotes[6] = "MESSAGE #6"

quotes[7] = "MESSAGE #7"

quotes[8] = "MESSAGE #8"

quotes[9] = "MESSAGE #9"

quotes[0] = "MESSAGE #10"

var quote = quotes[rand1]

// -->

</script>

把以下代码放在HTML文件任意地方:

<script language="JavaScript">

<!-- Hide

document.write("<i>" + quote + "</i>")

// -->

</script>

7、随机连接

把以下代码放在<head></head>之间:

<script language="JavaScript">

<!--Hide from non JavaScript browsers

an = 5

var ran = Math.random();

var talet = Math.round(ran * (an-1))+1;

function create() {

this.src = '

}

b = new Array()

for(var i=1; i<=an; i++) { b[i] = new create() }

b[1].src= "<a href='http://netscape.yahoo.com/guide/Whats_cool.html'>"

b[2].src= "<a href='http://www.disney.com'>"

b[3].src= "<a href='http://www.peoplelink.com/'>"

b[4].src= "<a href='http://www.china-contact.com/cool/interest.htm'>"

b[5].src= "<a href='HTTP://www.homeway.com.cn/html/homeway/navigator/index.html'>"

var vis = "";

vis += b[talet].src;

//-->

</SCRIPT>

把以

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