การส่งค่าจาก javascript ไปให้ php ครับ ต้องทำยังไง

 <script>
                      function handleFileSelect(evt) {
                        evt.stopPropagation();
                        evt.preventDefault();
                    
                        var files = evt.dataTransfer.files; // FileList object.

                        // files is a FileList of File objects. List some properties.
                        var output = [];
                        for (var i = 0, f; f = files[i]; i++) 
						{	
							
							// Only process image files.
							if (!f.type.match('image.*')) 
							 {
								continue;
							 }
							
							 var reader = new FileReader();
							 // Closure to capture the file information.
      							reader.onload = (function(theFile) 
								{
        							return function(e) 
									{	
										 var span = document.createElement('span');
          								 span.innerHTML = ['<img class="thumb" width="80" heigh="70" src="', e.target.result,
                                         '" title="', escape(theFile.name), '"/> ',escape(theFile.name),'(',theFile.type || 'n/a',') - ',theFile.size,' bytes <br>'].join('');
                                         document.getElementById('list').insertBefore(span, null);
									 };
      							})(f);
								 // Read in the image file as a data URL.
      							 reader.readAsDataURL(f);
                        }
                      }
						
						
                    
                      function handleDragOver(evt) {
                        evt.stopPropagation();
                        evt.preventDefault();
                        evt.dataTransfer.dropEffect = 'copy'; // Explicitly show this is a copy.
                      }
                    
                      // Setup the dnd listeners.
                      var dropZone = document.getElementById('drop_zone');
                      dropZone.addEventListener('dragover', handleDragOver, false);
                      dropZone.addEventListener('drop', handleFileSelect, false);
                    </script>