Mateobus Posted July 28, 2006 Share Posted July 28, 2006 Hello, I have an image upload page on my website, but I want to make it so that a person can preview the image on their computer before they upload it. Is this possible with javascript? Does anyone know of a good tutorial for this? Any help is appreciated. Quote Link to comment Share on other sites More sharing options...
AndyB Posted July 28, 2006 Share Posted July 28, 2006 Is it possible? Not with anything that runs in their browser. Quote Link to comment Share on other sites More sharing options...
HeyRay2 Posted July 28, 2006 Share Posted July 28, 2006 Not in PHP...But yes in JavaScript:Copied from [url=http://javascript.internet.com/forms/image-upload-preview.html]The JavaScript Source[/url][code]<!-- TWO STEPS TO INSTALL IMAGE UPLOAD PREVIEW: 1. Copy the coding into the HEAD of your HTML document 2. Add the last code into the BODY of your HTML document --><!-- STEP ONE: Paste this code into the HEAD of your HTML document --><HEAD><script type="text/javascript"><!-- Begin/* This script and many more are available free online atThe JavaScript Source!! http://javascript.internet.comCreated by: Abraham Joffe :: http://www.abrahamjoffe.com.au/ *//***** CUSTOMIZE THESE VARIABLES *****/ // width to resize large images tovar maxWidth=100; // height to resize large images tovar maxHeight=100; // valid file typesvar fileTypes=["bmp","gif","png","jpg","jpeg"]; // the id of the preview image tagvar outImage="previewField"; // what to display when the image is not validvar defaultPic="spacer.gif";/***** DO NOT EDIT BELOW *****/function preview(what){ var source=what.value; var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase(); for (var i=0; i<fileTypes.length; i++) if (fileTypes[i]==ext) break; globalPic=new Image(); if (i<fileTypes.length) globalPic.src=source; else { globalPic.src=defaultPic; alert("THAT IS NOT A VALID IMAGE\nPlease load an image with an extention of one of the following:\n\n"+fileTypes.join(", ")); } setTimeout("applyChanges()",200);}var globalPic;function applyChanges(){ var field=document.getElementById(outImage); var x=parseInt(globalPic.width); var y=parseInt(globalPic.height); if (x>maxWidth) { y*=maxWidth/x; x=maxWidth; } if (y>maxHeight) { x*=maxHeight/y; y=maxHeight; } field.style.display=(x<1 || y<1)?"none":""; field.src=globalPic.src; field.width=x; field.height=y;}// End --></script></HEAD><!-- STEP TWO: Copy this code into the BODY of your HTML document --><BODY><div align="center" style="line-height: 1.9em;">Test it by locating a valid file on your hard drive:<br><input type="file" id="picField" onchange="preview(this)"><br><img alt="Graphic will preview here" id="previewField" src="spacer.gif"><br> <div style="font-size: 7pt;">Script submitted by: <a href="http://www.abrahamjoffe.com.au/">Sydney Wedding Video / DVD</a></div></div><p><center><font face="arial, helvetica" size"-2">Free JavaScripts provided<br>by <a href="http://javascriptsource.com">The JavaScript Source</a></font></center><p><!-- Script Size: 2.43 KB -->[/code] Quote Link to comment Share on other sites More sharing options...
Mateobus Posted July 28, 2006 Author Share Posted July 28, 2006 Thanks for the script, but it isn't working. I actually tried this one before with no success. I think that it is a new security feature built in to ie that is stopping the preview from working. Is this correct? I think the only way to do it would be to make a whole java applet. Any suggestions?Tested in IE7 beta 1 and firefox 1.5.0.4 Quote Link to comment Share on other sites More sharing options...
simcoweb Posted July 28, 2006 Share Posted July 28, 2006 I'd suggest making an additional step in your upload process. Like a confirmation page before the upload?"Is this the image you wish to upload? If yes click Submit. If no, search below for another image."I'm afraid that doing it in any other way is going to be extremely inconsistent and based upon browsers, versions, security settings, etc. etc. etc. Quote Link to comment Share on other sites More sharing options...
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