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 valueofthis=  myElements.eq(i).attr("sizefile");
    var valuetostr = valueofthis.toString();
 		var sumoffilessize = (valuetostr + sumoffilessize);
 
    } 
    
    alert(sumoffilessize);