when i click the "save" that particular image will be download to desktop

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jQuery

Canvas

<div id="rightoutputimgae">
<div id="rightimgId" class="rightimg" rel="tooltip" content="<img src='jqe13/image/1.jpg' class='tooltip-image'/> ">
<div id="outputimageId" class="outputimage"><img src="jqe13/image/1.jpg" alt="Right Bottom Image"></div>
</div>
<ul><li id="outcheckbox"><input name="outCheck" type="checkbox"></li>
<li id="outedit"><a href="#"><img src="jqe13/image/edit_s.PNG" alt="edit" title="Edit"></a></li>
<li id="outdelete"><a href="#"><img src="jqe13/image/delet_c.PNG" alt="delete" title="Delete"></a></li>
<li id="outfullscreen"><a href="#"><img src="jqe13/image/fullscreen_c.PNG" alt="Full Screen" class="fullscreen" title="Full Screen"></a></li>
<li id="outshare"><a href="#"><img src="jqe13/image/share_c.PNG" alt="Share" title="Share"></a>
<div id="menu">
<div id="tooltip_menu">
<a href="#" class="menu_top" id="email"><img src="jqe13/image/email.PNG" alt="Email" title="Email"></a>
<a href="#" onClick="postToFeed()" class="facebook"><img src="jqe13/image/fb.PNG" alt="Facebook" title="Facebook"></a>
<a href="#" id="twitter"><img src="jqe13/image/twitter.png" alt="Twitter" title="Twitter"></a>
<a href="#" class="menu_bottom" id="save"><img src="jqe13/image/save.PNG" alt="Save" title="Save"></a>
</div>
</div>
</li>
<li id="outprint"><a href="#" class="printMe"><img src="jqe13/image/print.PNG" alt="Print" title="Print"></a></li>
</ul>
</div>



My qus is ,,,i have created image dynamically with some items...i want when i click on "save" directly download that particular image to client desktop using HTML5 canvas & Jquery.
i am using image2canvas.js file to draw a image to canvas......
i get the image Id like this and converted into canvas.

$("#save").live('click', function()
{
var sectionId = $(this).parents('ul').attr('id');
var outputId = sectionId.replace('ul','img');
console.log(sectionId);
console.log(outputId);

var imgTarget = $('#'+outputId).image2canvas();
});
here what i getting is i created image dynamically it placed in div id= "rightoutputimgae" ...click on "save" its converted to canvas at same place....means original image converted. that will be converted into some hidden canvas not affected the original image
& i want to download that canvas with image ............into desktop .....

total process will be done when click the "save" ,conversion and download...

plz any one help me.............