java

HTML

<div id="fileInfo1">
  <div style="clear:both;padding:5px;" class="fileRess" sizefile="206519" id="fileres_0">
    <input size="1" type="file" class="file" name="attach[]" id="attacher" style="display:none" multiple="" value="undefined">206519 </div>
  <div style="clear:both;padding:5px;" class="fileRess" sizefile="290284" id="fileres_1">
    <input size="1" type="file" class="file" name="attach[]" id="attacher" style="display:none" multiple="" value="undefined">290284 </div>
</div>

<div id="result"></div>

JavaScript

var myElements = jQuery(".fileRess");
 	var sumoffilessize = 0;
 	for (var i = 0; i < myElements.length; i++) {
 	  var sumoffilessize = (parseInt(myElements.eq(i).attr("sizefile")) + sumoffilessize);
 	}

 	alert(sumoffilessize);