jquery - Using image value to choose an image from an array and display it (Javascript) -

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i have bunch of pictures , want display bigger version of them when clicked. have right now:

    <div class="gallery">         <div>             <img src="content/imggallery/img1.jpg" class="oldimg" value="0">         </div>         <div>             <img src="content/imggallery/img2.jpg" class="oldimg" value="1">         </div>         <div>             <img src="content/imggallery/img3.jpg" class="oldimg" value="2">         </div>     </div>

and javascript/jquery:

$(function() { var docheight = $(document).height(); var imagedata = new array (3); imagedata[0]="0.jpg"; imagedata[1]="1.jpg"; imagedata[2]="2.jpg";  $(".oldimg").click(function(){     $("body").append("<div id='overlay'></div>");     $("body").append("<div id='newimg'></div>");      $("#overlay")     .height(docheight)     .css({         'opacity' : 0.4,         'position': 'fixed',         'top': 0,         'left': 0,         'background-color': 'black',         'width': '100%',         '-ms-filter': 'progid:dximagetransform.microsoft.alpha(opacity=50)',         'filter': 'alpha(opacity=50)',         'z-index': 1000     });     $("#newimg")     .css({         'position': 'fixed',         'top': '50%',         'left': '50%',         'background-image': 'url(' + imagedata[] + ')',         'transform': 'translate(-50%, -50%)',         'width': '100%',         'height': '100%',         'z-index': 1010      });     $("#newimg").click(function(){         $("#newimg").remove();         $("#overlay").remove();     }); }); });

now, how value of image, pass array , 'background-image': 'url(' + imagedata[] + ')'? additionally, how adjust #newimg size fit image? because width , height 100% should no-reapeat, put no-reapeat?
code works fixed height/width , specific img background i. e. 1.jpg.
working example in jsfiddle: http://jsfiddle.net/bx27sjll/

big thanks!

use attr() image value 

 $(".oldimg").click(function(){        var value= $(this).attr("value");        imagedata[value]; // value  });

demo


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