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JavaScript - Random Background Change With Javascript
can you explain someone step by this code?i didn't get it.
<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"; } // --> </script> Similar TutorialsI currently have a web site in which I am using some Javascript to change the Background of a DIV. The DIV is defined as follows : <div id="outerscreen"> <div id="mainscreen"> </div> </div> and the Javascript I am using is as follows : var docEl = document.getElementById('outerscreen'); docEl.style.backgroundImage = "url('pics/intro.gif')"; My problem arises where this function works perfectly on IE but fails for Chrome, FF and Safari. Can anyone shed any light on what the problem is and how I might be able to resovle this. Thanks in advance Chris I have a div that changes background on click. Example: <script type="text/javascript"> function changeBackground(strURL) { document.getElementById('about').style.backgroundImage="url("+strURL+")"; } </script> <body> <div id="about"> <a href="#about" onClick="changeBackground('mainbackground.jpg');">text</a> <a href="#about" onClick="changeBackground('background2.jpg');">text</a> </div> This part works just fine so no issues. However, I have content on the mainbackground.jpg that is getting transferred over to the other backgrounds as well. I would like each background to have its own paragraph content. I do not want to embed the info into the images for SEO reasons. Any ideas on how to do this? Thanks! Hi, what I want to do is create a menu with rollover buttons but each button also changes the background image of a div. I've managed to change the colour of the div but not add an image there. I've added my code so you can have a look. Case 0 shows me attempting to change the background image. I must be doing something wrong. I've left the other cases as colours so you can see how I did that. I eventually want it all to be images. I'm creating a Joomla website (not sure if that makes a difference). Code: <body onload="addHandlers()">
<script type="text/javascript" language="javascript">
function addHandlers(){
var allMenus = document.getElementById("services_menu").getElementsByTagName("li");
for(var k = 0; k < allMenus.length; k++)
{
allMenus[k].setAttribute('onmouseover', 'ChangeContentBg('+ k + ')' );
allMenus[k].setAttribute('onmouseout', 'Reset()');
}
}
</script>
<script type="text/javascript">
function ChangeContentBg(i)
{
var Num = parseInt(i);
var ContentDiv = document.getElementById("content");
switch(Num)
{
case 0:
ContentDiv.style.background-image = 'url(../images/waxingtinting_rollover_image.jpg)';
break;
case 1:
ContentDiv.style.backgroundColor = 'red';
break ;
case 2:
ContentDiv.style.backgroundColor = 'purple';
break ;
case 3:
ContentDiv.style.backgroundColor = 'green';
break ;
case 4:
ContentDiv.style.backgroundColor = 'yellow';
break ;
/*For each new color you would have to add a new case and change ChangeContentBg() parameter , to the case you want in <li> tag*/
}
}
function Reset()
{
document.getElementById("content").style.backgroundColor = '';
}
</script>
I have a div that changes background on click. Example: <script type="text/javascript"> function changeBackground(strURL) { document.getElementById('about').style.backgroundImage="url("+strURL+")"; } </script> <body> <div id="about"> <a href="#about" onClick="changeBackground('mainbackground.jpg');">text</a> <a href="#about" onClick="changeBackground('background2.jpg');">text</a> </div> This part works just fine so no issues. However, I have content on the mainbackground.jpg that is getting transferred over to the other backgrounds as well. I would like each background to have its own paragraph content. I do not want to embed the info into the images for SEO reasons. Any ideas on how to do this? Thanks! Hi Guys, I have a little question... I know that adding Code: onclick="document.body.style.backgroundColor='#F3B90C'; to a div will change the body background colour to the above colour.. But what I was wondering was this.. Is it possible, instead of adding the code to the actaul div itself to pass the function like this... Code: <script type="text/javascript">
$("Object").click(function(){
document.body.style.backgroundColor = "#000000";
});
</script>
Any help/info is appreciated Kind regards, paffley Hi, I am trying to work out a code where I can change the background colour of an HTML page via external JS page. Please note that I will be using different HTML pages with different colours so have to use Arrays. Here is what I have so far!!! here is my function, <script language="JavaScript"> var backColor = new Array(); backColor[0] = '#000000'; backColor[1] = '#111111; backColor[2] = '#222222'; backColor[3] = '#333333'; function changeBG(whichColor){ document.bgColor = backColor[whichColor]; } </script> ------------------------------------- What I need is to apply changeBG function to my HTML page using colour [0] Any help would be greatly appreciated! Hello. The code below lets a user select a drop down option and a picture changes depending on the selection. I am trying to make it so when you select an option on the dropdown the picture shows up in the center of the screen and in the background behind the text. Here is the code. Code: <html>
<head>
<style type='text/css'>
#txt {background-repeat:no-repeat;width:200px;height:200px;}
</style>
<script type='text/javascript'>
function div_bg(team){
document.getElementById('txt').style.backgroundImage="url(images/" + team + ".jpg)";
}
</script>
</head>
<body>
<select name='team' onChange='div_bg(this.value);'>
<option name='arsenal' value='arsenal'>Arsenal</option>
<option name='liverpool' value='liverpool'>Liverpool</option>
</select>
<div id='txt'></div>
</body>
Thanks in advance!! Looking for a way to have background music play automatically when my site loads, with the music being randomly picked from a list of several songs.. So each time the page loads, a different song should play.. Can be JavaScript or Flash, whichever way works the best.. Any ideas?
I have 3 background images, and 1 is picked at random to be the background image of the body when loading the page.My code is below. Right now it's just white, can't get any pictures to load. I have checked the URLs and they are correct. Can someone help out? Here is my code in the header: Code: <script type="text/javascript">
function getBackground(){
var bgimg = new Array();
bgimg[0] = "background1";
bgimg[1] = "background2";
bgimg[2] = "background3";
var random = Math.floor(Math.random() * bgimg.length);
var imgurl = bgimg[random];
document.body.style.backgroundImage = 'url(' + imgurl + ')';
}
</script>
body: Code: <body onload="getBackground()"> I placed this code in an external js file. Nothing happens. What do I need to change? Code: var randomPic = new Array();
randomPic[0] = "images/home/binoculars.jpg";
randomPic[1] = "images/home/conductor.jpg";
randomPic[2] = "images/home/dandelion.jpg";
randomPic[3] = "images/home/dog.jpg";
var whichPic = Math.floor((Math.random() * randomPic.length));
document.getElementById('tag').style.backgroundImage = randomPic[whichPic];
Found this random background img code that works great: Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled</title>
<script type="text/javascript">
function changeImg(imgNumber) {
var myImages = ["images/image0.jpg", "images/image1.jpg", "images/image2.jpg", "images/image3.jpg"];
var imgShown = document.body.style.backgroundImage;
var newImgNumber =Math.floor(Math.random()*myImages.length);
document.body.style.backgroundImage = 'url('+myImages[newImgNumber]+')';
}
window.onload=changeImg;
</script>
<style type="text/css">
.bg {background-attachment:fixed; background-repeat: no-repeat; background-position:0% 0%;}
</style>
</head>
<body class="bg">
<p>Some text</p>
<!-- put a lot text lines here to see that the background stays fixed. -->
<p>Some text</p>
</body>
The only problem i have is making the background image width and height 100% so that the entire image fills in the screen and fills in on resize of window. Please Help...thanks in advance Brand new to the forum, so first off... Hello all!! I have been working on a project which randomly changes the text font of a word submitted (Color and Size). At present the code works fine, using the below Javascript. Code: <SCRIPT LANGUAGE="JavaScript">
function randomise(){
var words=document.myform.wordlist.value;
var spacer="";
words=words.split(document.myform.randomiseby.value)
document.myform.code.value=" ";
var colourscheme=new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F")
for(var time=0;time<=(words.length-1);time++){
{var c1=Math.round(Math.random()*(colourscheme.length-1));
var c2=Math.round(Math.random()*(colourscheme.length-1));
var c3=Math.round(Math.random()*(colourscheme.length-1));
var c4=Math.round(Math.random()*(colourscheme.length-1));
var c5=Math.round(Math.random()*(colourscheme.length-1));
var c6=Math.round(Math.random()*(colourscheme.length-1));
var size=1+Math.round(Math.random()*6);
document.myform.code.value+="<font color=\"#"+colourscheme[c1]+colourscheme[c2]+colourscheme[c3]+colourscheme[c4]+colourscheme[c5]+colourscheme[c6]+"\" size=\""+size+"\">"+words[time]+"</font>"+spacer+" ";
}
}
looks_like.innerHTML=document.myform.code.value;
}
</script>
To really highlight the text i would like to keep the font white and change the background colour but i don't have a clue how to do it... Please note: i am a complete noob to Javascript and the above code has been bodged together from a number of tutorials. Can anyone help? Hi CodingForum! For my website, I have a working script that changes the background image of my website every time it is reloaded. However, I would also like the image to dynamically resize as the user resizes the browser window. here is a code snippet: Code: <head>
<script type="text/JavaScript">
/*<![CDATA[*/var el="bgImg";var bgimg=new Array("../00home/06home.jpg","../00home/07home.jpg");var random=Math.round((bgimg.length-1)*Math.random());var cssStr="#"+el+" { background: url("+bgimg[random]+") no-repeat center } ";var style=document.createElement("style");style.setAttribute("type","text/css");if(style.styleSheet){style.styleSheet.cssText=cssStr;}else{var cssText=document.createTextNode(cssStr);style.appendChild(cssText);}document.getElementsByTagName("head")[0].appendChild(style);/*]]>*/
</script>
<style type="text/css">
.rotatebg {
z-index:0;
position:fixed;
top:0; left:0;
width:1378px; height:1178px;
background-repeat: no-repeat;
background-position:inherit;
overflow:hidden;
}
</style>
</head
<body>
<div class="rotatebg" id="bgImg" style="width:100%; height:100%" ></div>
</body>
Does anyone know how I can augment/alter this coded setup to enable the randomly loaded background image to proportionately fill the browser window? Clearly I'm doing something wrong. Here's my external javascript: Code: document.getElementById('maincontent').style.backgroundColor = "#660000";
Here's my external CSS Code: #maincontent {
background-color: #999;
}
Here's my HTML: Code: <div id="container">
<div id="maincontent">
<p>blah blah blah</p>
</div>
</div>
Nothing happens. What am I doing wrong? Hi, is it possible to have a different background image on IE to firefox, I am doing my background image as shown below: Code: <body style="background-image: url(unbranded_bg.png);"> however I want script that says if IE, show unbranded_bg2.png and if firefox show unbranded_bg.png. Many Thanks, Simon Can this be done? Change background color a row of depending on cell data on that row. e.g Items <table border="1"> <tr> <td><b>Cost</b></td> <td><b>Item</b></td> </tr> <tr> <td>12</td> <td>hats</td> </tr> <tr> <td>34</td> <td>socks</td> </tr> <tr> <td>12</td> <td>hats</td> </tr> <tr> <td>12</td> <td>hats</td> </tr> <tr> <td>24</td> <td>gloves</td> </tr> </table> Any pointers in the right direction please Hi, i have a <td> with a background image and 3 other <td>'s that contains blank photos in them, i need 2 things that they'll make: 1. when i click on one td that contain blank image lets call it tdimg1 it will toggle the visibility of the div inside the first td lets call it tdframe and for the div lets call it divframe1, (i have a script that works) but the main issue is that when i click tdimg1 tdimg2 and tdimg3 it will show divframe1 divframe2 and divframe3 what i want is that it will show only one at a time, so if ill hit the tdimg2 it will show me divframe2 and if after that ill hit tdimg3 it will hide the divframe2 and appear the divframe3. 2.the tdframe have an image as a background lets call it basicbg.jpg, i want that when i will hit tdimg1 the background of the tdframe will change to lets say newbg1.jpg, and as ill hit it again it will go back to basicbg.jpg, as ill hit tdimg3 it will change to newbg3.jpg and if i wont "close" it and click tdimg2 it will just change it to newbg2.jpg thanks! Could anyone show me a script that would allow the user whos on my site change the background image from the default color to an image from a URL? And then it would have to save their choice in a cookie. Thanks!
Hi , I have 5 or 6 textboxes and all of them are required ( have required field validators ) .. I want to change their background color to yellow when they are left blank and when the box is filled the backgorund color to white ..Is it possible to do via javascript ..I am a beginer so any help is greatly appreciated I am wondering if it would be possible to add a Cookie to this code i found, i am wanting the browser to remember the chosen background image and save it when the user closes the browser. Currently when the option is selected it does not remember the choice when you then go back to the page, any help on this would be much appreciated! Many Thanks Code: <script type="text/javascript">
function changeTheme()
{
var e = document.getElementById("themes");
var theme = e.options[e.selectedIndex].value;
console.log(theme);
document.getElementById("shelf").style.backgroundImage = "url("+theme+")";
}
</script>
<body id="shelf"> <select id="themes" onChange="changeTheme()"> <option value="images/background1.jpg">Default</option> <option value="images/background2.jpg">Oriental</option> </select> |
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