JavaScript - Which Is Javascript Code To Resize Image

Hi,
I was wondering how to resize a div containing some text by setting a width and height so it would stretch to fill that area like an <img> tag? E.g. when you set the width and height attribute of an image, it resizes the image to fill that area. I do not wish to send a request to a php script to build an image containing the text since it will be slow and affect the scalability of the web app. Oh, and I would preferably not like to use html5 because it is a requisite that I need compatibility with ie7+ (and firefox/chrome).

Thanks,
akrylic

Hello Everyone!

I hope someone can help me with fixing this javascript code

About the Code
So I got this Resize Image Code here. This code is for a free Forum Software called Zetaboards (just like phbb or vbulletin). I just need to put the code in my Admin Control Panel to make it work for the whole forum.

What does the code do?
The code add a BBCode to the posting page, which allows all members to insert images to their posts (just like the usual "img" bbcode) and also makes it possible to resize the images.

There are different resize image options:
1. [rimg]IMG_SRC[/rimg] // just inserts an image, like the normal "(img)(/img)" TAGS do.
2. [rimg=Width,Height]IMG_SRC[/rimg ] // with this option, you can change the width and height of the image.
3. [rimg=Percentage(needs % to be included)]IMG_SRC[/rimg] // Resize the image by typing the percentage size of the original image
4. [rimg=h,height]IMG_SRC[/rimg] //Just type the wanted height for the image, and the Width will be automatically adjusted
5. [rimg=w,width]IMG_SRC] //same as the code above, just the Height will be automatically adjusted instead.
6. [rimg=x]IMG_SRC[/rimg] //x will be both the height and width (so it'll be a square...)

Here is a test thread I made to test the "rimg code", so you can see how the code works:
http://s1.zetaboards.com/Piano2/topic/2874654/1/

What are the problems with the Code?
- the Images are not resized correctly
- sometimes, the images are resized correctly, but when i refresh the page, the images are again resized wrong.
- or sometimes, when the images are displayed wrong (too big or small), they will become fine when i refresh the page again
- In the Search View (when using the search) the images are too big and almost take the whole screen...
- the first option "[rimg][rimg]" even doesn't work completely on IE and Google Chrome and causes all other [rimg] bbcodes to be disabled


And finally this is the Javascript Code:
PHP Code:
<script type="text/javascript">
// Rimg by RedBldSandman of ZBCode.com
$(function() {
if (location.href.match("topic")||location.href.match("single")) {
$(".c_post").each(function() {
parse_rimg(this);
});
} else if (location.href.match("search")) {
$(".search_results").each(function() {
parse_rimg($(this).children("div:eq(0)"));
});
} else if (location.href.match("post")) {
var rimg_br = ($("a:contains(Full BBCode List)").next().html()!=null)?" ":"<br />";
$("td#c_bbcode").append(rimg_br+"<button name='rimg' type='button'>Rimg</button>");
$("button[name=rimg]").mouseover(function() {
$("input[name=helpbox]").val("Insert Image (with resize options)");
}).click(function(e) {
if (e.preventDefault) e.preventDefault();
e.returnValue = false;
var u_p = prompt("Enter the Image Location","http://");
if (u_p==null) return;
var u_w = prompt("Options:\n1. Enter the chosen Width for the Image\n2. Enter the dimension to change (w for width or h for height)\n3. Enter the Percentage you wish to resize the Image to (include % sign)\n4. Leave blank for un-resized image");
if (u_w==null) return;
u_w = u_w.replace(/s/gi,"").toLowerCase();
if (u_w=="") {
ZetaInsert("[rimg]"+u_p+"[/rimg]");
return;
} else if (u_w.match("%")) {
ZetaInsert("[rimg="+u_w+"]"+u_p+"[/rimg]");
return;
} else if (u_w=="h") {
var u_h = prompt("Enter Resize Height");
if (u_h==null) return;
ZetaInsert("[rimg=h,"+u_h+"]"+u_p+"[/rimg]");
return;
} else if (u_w=="w") {
var u_h = prompt("Enter Resize Width");
if (u_h==null) return;
ZetaInsert("[rimg=w,"+u_h+"]"+u_p+"[/rimg]");
return;
} else if (parseInt(u_w)) {
var u_h = prompt("Enter Chosen Height");
if (u_h==null) return;
ZetaInsert("[rimg="+u_w+","+u_h+"]"+u_p+"[/rimg]");
}
});
$("#topic_review tbody tr").each(function() {
parse_rimg($(this).children("td:eq(1)"));
});
}
});

function parse_rimg(z) {
$(z).html($(z).html().replace(/[rimg(?:=s*([dw%]+?)s*(?:,s*(d+?)s*)?)?](.+?)[/rimg]/gi,function(x,y,a,b) {
if (y.match("%")) {
y = y.replace(/[^d.]/gi,"");
return "<img src='"+b+"' alt='Posted Image "+y+"' class='Rimg_percent' />";
} else if (y.match(/D/i)) {
y = y.replace(/[^hw]/gi,"").toLowerCase().split("")[0];
y = (y!="h"&&y!="w")?null:y;
if (y) {
return "<img src='"+b+"' alt='Posted Image "+a+"' class='Rimg_single Rimg_"+y+"' />";
} else {
return x;
}
} else if (!a) {
return "<img src='"+b+"' alt='Posted Image' width='"+y+"' height='"+y+"' />";
} else {
return "<img src='"+b+"' alt='Posted Image' width='"+y+"' height='"+a+"' />";
}
}));

$(".Rimg_single").not("div.spoiler .Rimg_single").each(function() {
Rimg_single(this);
});

$(".Rimg_percent").not("div.spoiler .Rimg_percent").each(function() {
Rimg_percent(this);
});

$(z).find("div.spoiler_toggle").click(function() {
$(this).next().toggle();
$(this).next().find(".Rimg_single").each(function() {
Rimg_single(this);
});
$(this).next().find(".Rimg_percent").each(function() {
Rimg_percent(this);
});
});
}

function Rimg_single(x) {
var oldH = $(x).height();
var oldW = $(x).width();
var newD = $(x).attr("alt").replace(/[^d.]/gi,"");
if ($(x).hasClass("Rimg_h")) {
$(x).height(newD).width((newD/oldH)*oldW);
} else if ($(x).hasClass("Rimg_w")) {
$(x).width(newD).height((newD/oldW)*oldH);
}
$(x).attr("alt","Posted Image").removeAttr("class");
}

function Rimg_percent(x) {
var NewD = $(x).attr("alt").replace(/[^d.]/gi,"")/100;
$(x).height($(x).height()*NewD).attr("alt","Posted Image").removeAttr("class");
}

function Preview() {
var prevQuote;
if ($("#c_post-preview").length || $("#c_post textarea").val() || $("#txt_quote").val()) {
if (!$("#c_post-preview").length) {
$("#c_post").prepend("<div id='c_post-preview'></div>");
}
if ($("#txt_quote").length && $("#txt_quote").val()) {
prevQuote = "[quote]" + $("#txt_quote").val() + "[/quote]";
} else {
prevQuote = "";
}
$.post(main_url + "tasks/", { "task": 5, "post": prevQuote + $("#c_post textarea").val() }, function(s) {
$("#c_post-preview").html(s);
if (window.parse_utube&&typeof window.parse_utube=="function") parse_utube($("#c_post-preview"));
parse_rimg($("#c_post-preview"));
});
}
return false;
}
</script> 



Can someone please help to make the code work correctly so the images are resized properly at least on Firefix and IE?

Thanks for your answers and help!

I have an asp.net textbox. I need to use javascript so that there are no postbacks. I would like to click the button and the textbox height kept increases each time the user clicks the button. So far I can toggle:

function resize(){
var textbox = $get('<%=txtWhoTo.ClientID %>');
textbox.style.height = textbox.style.height == '56px' ? '23px' : '56px';
}

I would like to increase the height 56px each time the clicks the button.

hey guys

i'd like to have a javascript code that resizes the window to full screen

it's my 404 page and I need it to resize the custom 404 page to fullscreen, or full window size

how would I go about doing that?

I am looking for a javascript code for this idea under this message

----------------------------------------------------------------------------------------------------------------------------------------------------

I want to create a kind of shopping website so when you click on a image or text it will add some text to a textarea,, it will include the name of item and price of an item

Hi all let me start off by saying: "AAAAAAHHHHHHHAAAAAAA"

Feel better now!

I have an iFrame which loads individual pages from my site, I am using javaScript to tell the iFrame to resize to the size of the page that is being loaded, the problem is when I click on the link the iFrame does not resize but if I click on the link again it does resize! The fuction is called but only the second time round. Also the none of the script works in FireFox! HELP PLZ!

My Code:

Code:

<SCRIPT LANGUAGE=javascript>
<!--
function reSize()
{
	try{	
	var oBody	=	ifrm.document.body;
	var oFrame	=	document.all("ifrm");
		
	oFrame.style.height = oBody.scrollHeight + (oBody.offsetHeight - oBody.clientHeight);
	}
	//An error is raised if the IFrame domain != its container's domain
	catch(e)
	{
	window.status =	'Error: ' + e.number + '; ' + e.description;
	}
}
//-->
</SCRIPT>


<body onload="reSize()" onresize="reSize()">

<li>
	<a href="home.html" rel="nofollow" target="info" onclick="reSize();">
	<img src="css/images/home.gif" width="40" height="40" alt="" class="nav_menu_image" />
	<span class="nav_title">Home</span>
	<br/>
	</a>
</li>


<iframe onresize=reSize() id=ifrm  src="home.html" name="info" frameborder="0" 
	padding="0" vspace="0" hspace="0" marginwidth="0" marginheight="0" width="500px" 
	allowTransparency="true" noresize>
</iframe>

hi,
I have created a flash video that work on a php table (like php-nuke), this is seen well on my PC, instead with various screen the video size is not good. ON screen big the video is small, on screen small the video is big... How i can made a script that change the dimension of flash video ? any idea ? please help me..

I am trying to write a custom BBcode for a forum I moderate. I don't have the licensing information because its not my forum and i am just a moderator. If anyone wants to verify the legitimacy of the forum I work for please PM me and I will try and get you any information I can.

This code that I has works perfect in EditRocket, but when I add it to the custom BBcode the image does not resize.

Original EditBucket Code:
Code:

<html>
<head>
<script type="text/javascript">

function show_confirm(testimg)
{
var theImg = document.getElementById('testimg');
			var theWidth = theImg.width;
			var theHeight = theImg.height;
			if (theWidth<250)
			{
            theImg.width = theWidth;
            theImg.height = theHeight;
			}
			else
			{
					theImg.width = 250;
					theImg.height = theHeight*(250/theWidth);
			}
			
}
</script>
</head>
<body>
<img id="testimg" onload="show_confirm(testimg)" src="http://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Example.svg/600px-Example.svg.png">


</body>
</html>

vBulletin Custom BBcode:

title: Test Image
bbcode tag name: timage
Replacement:
Code:

<script type="text/javascript">

function show_confirm(testimg)
{
var theImg = document.getElementById('testimg');
			var theWidth = theImg.width;
			var theHeight = theImg.height;
			if (theWidth<250)
			{
            theImg.width = theWidth;
            theImg.height = theHeight;
			}
			else
			{
					theImg.width = 250;
					theImg.height = theHeight*(250/theWidth);
			}
			
}
</script>
<body>
<img id="testimg" onload="show_confirm(testimg)" src="{param}">
</body>

Example: [timage]http://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Example.svg/600px-Example.svg.png[/timage]
Description: Embed imaged inline with forum
Option: no

Hi
I would appreciate a pointer in the right direction for a script I require.

I will have two text boxes that will accept numeric values and an image.
What I need is if the user change the value of box 1, the value in box 2 will automatically update depending on the pixel dimensions of the image and vice versa.

Basically I need to automatically calculate the pixel ratio of an image and then use that value to multiply by the user inputted size.

Any ideas?
Rob

hello i'm building a search engine and one of the options i'm implementing is this: the user is able to control the scale of the thumbnail, small, medium and large the problem is that when i have 1000 pictures inside a div when i hit resize i get like a 5 sec delay for them to resize here is the javascript code:

Code:

Code:

var factor;
function fillImg(imgPath, imgElement){
    imageObj = new Image(32,32);
    imageObj.src = imgPath;
    if(imgElement.src != imgPath ){
        imgElement.src = imgPath;
    }
}

function errHandler(err){
    alert("Error occured!");
}

function resizeImgList(scale){
    if(scale == "s"){
        factor = 50;
    }else if(scale ==  "m"){
        factor = 100;
    }else{
        factor = 150;
    }

    var lists = document.getElementById("rs_ls").getElementsByTagName("li");
    for(var li_index = 0; li_index < lists.length; li_index++){
        var canvas = lists[li_index].getElementsByTagName("span");
        for(var c_index = 0; c_index < canvas.length; c_index++){
            var link = canvas[c_index].getElementsByTagName("a");
            for(var a_index = 0; a_index < link.length; a_index++){
                var image = link[a_index].getElementsByTagName("img");
                for(var i_index = 0; i_index < image.length; i_index++){
                    var w = $(image[i_index]).attr("width");
                    var h = $(image[i_index]).attr("height");
                    var results = resizeItem(w,h,factor,factor);
                    var w = results[0];
                    var h = results[1];
                    var m = results[2];
                    $(image[i_index]).attr("width",w);
                    $(image[i_index]).attr("height",h);
                    $(image[i_index]).attr("style","width:"+w+"px;height:"+h+"px;");
                }
                wa = w+12;
                ha = h+12;
                $(link[a_index]).attr("style","width:"+wa+"px;height:"+ha+"px;");
            }
            wc = w+12;
            hc = h+12;
            $(canvas[c_index]).attr("style","width:"+wc+"px;height:"+hc+"px;margin-left:"+m+"px;margin-right:"+m+"px;");
        }
        wli = w + 12 + m * 2;
        hli = h + 12;
        $(lists[li_index]).attr("style","width:"+wli+"px;height:"+hli+"px;");
    }
}


function resizeItem(eWidth, eHeight, tWidth, tHeight) {
    percentage = (tHeight / eHeight);
    newHeight = parseInt(eHeight * percentage);
    newWidth = parseInt(eWidth * percentage);
    if (newWidth > tWidth) {
        percentage = (tWidth / newWidth);
        newHeight = parseInt(newHeight * percentage);
        newWidth = parseInt(newWidth * percentage);
    }
        
    margin = (tWidth - newWidth + 12) / 2;
    results = [newWidth, newHeight, margin];
    return results;
}

each result set of 50 images has this structu

HTML Code:

Code:

<span>
<ul>
<li>...</li>
<li>...</li>
<li>...</li>
<li>...</li>
.
.
.
<li>...</li>   <!-- 50 <li> -->
</ul>
</span>

so 50 results are contained inside a span
each <li> has this structure inside:

HTML Code:

Code:

<li>
<span>
<a href...>
<img>
</a>
</span>
</li>

I altered the resizeImgList function with 1 for loop but even then it didnt seem to improve. i was thinking that i could resize only the results the user is currently seeing inside the div, the current <span> of results but i'm anaware of how to accomplish this please if anyone has any idea I would be gratefull.

Thank you.

Peter.

PS. results (spans) are fetched via AJAX on scrolldown inside the a div (which is the result container).

Hi' there

Is there anyway to make a custom resize function that resizes one of my div elements on the webpage the same amount of pixels as the browser window gets resized?

Hey folks..

Hope you can help, I'm completely new to this and have no knowledge at all when it comes to javascript. Have been using this script on my site for a while. Is there anyway I can add a URL link to the images that are in my selector? When clicked would go to that page on my website.

Thanks in advance of any help

Nat


<script language="JavaScript">

/*
Random image slideshow- By Tyler Clarke (tyler@ihatecoffee.com)
For this script and more, visit http://www.javascriptkit.com
*/

var delay=10000 //set delay in miliseconds
var curindex=0

var randomimages=new Array()

randomimages[0]="http://www.anywebsite.com/images/splash1.jpg"
randomimages[1]="http://www.anywebsite.com/images/splash2.jpg"
randomimages[2]="http://www.anywebsite.com/images/splash3.jpg"
randomimages[3]="http://www.anywebsite.com/images/splash4.jpg"
randomimages[4]="http://www.anywebsite.com/images/splash5.jpg"

var preload=new Array()

for (n=0;n<randomimages.length;n++)
{
preload[n]=new Image()
preload[n].src=randomimages[n]
}

document.write('<img name="defaultimage" src="'+randomimages[Math.floor(Math.random()*(randomimages.length))]+'">')

function rotateimage()
{

if (curindex==(tempindex=Math.floor(Math.random()*(randomimages.length)))){
curindex=curindex==0? 1 : curindex-1
}
else
curindex=tempindex

document.images.defaultimage.src=randomimages[curindex]
}

setInterval("rotateimage()",delay)

</script>

Hello,

I am working on a page that has a jQuery full browser BG image and I am trying to also utilize a MooTools gallery. There seems to be some interference between the two JavaScripts as only one works (whichever one is last in order in the header of the HTML document).

Links:

http://www.courtneyhunt.com.au/press_bg.html
http://www.courtneyhunt.com.au/press_gallery.html

I am a complete novice with JavaScript so if anyone could help that would be great.

Thank you in advance.

Got the code he

http://www.javascriptkit.com/script/cut173.shtml

Using the code he
http://www.lousshirtshack.com/Rouse-...t_p_2860.html#

I have the top 2 pulldown selections live with images mapped. Do you guys see any reason why it won't change when I pull down?