From StackOverflow answer http://stackoverflow.com/a/16090621/1677912.

readme.md

moveRange

Google Apps-Script spreadsheet function.

Move all values from source range to destination range. Upon completion, source range will be cleared. Source values will be moved into a destination range starting at the "top left" of the destination range, using the dimensions of the source range. This is a blind copy, with no overwrite test.

Parameters:

<tbody>
    <tr>
            <td class="name"><code>source</code></td>
        <td class="type">
                    Range   
        </td>
        <td class="description last">Range Object to take values from.</td>
    </tr>
    <tr>
            <td class="name"><code>destination</code></td>
        <td class="type">
                    Range   
        </td>
        <td class="description last">Range Object to receive values.</td>
    </tr>
</tbody>

Name	Type	Description

Returns: null

moveRange.js

/**
 * Move all values from source range to destination range. Upon
 * completion, source range will be cleared. Source values will
 * be moved into a destination range starting at the "top left"
 * of the destination range, using the dimensions of the source
 * range. This is a blind copy, with no overwrite test.
 *
 * @param {Range} source Range Object to take values from.
 * @param {Range} destination Range Object to receive values.
 *
 * @returns {null}
 */
function moveRange(source,destination) {
  var sourceSheet = source.getSheet();
  var destSheet = destination.getSheet();
  var sourceData = source.getValues();
  var dest = destSheet.getRange(
    destination.getRow(),
    destination.getColumn(),
    sourceData.length,
    sourceData[0].length);
  dest.setValues(sourceData);
  source.clear();
}
 
// Test function
function test_moveRange() {
  var sourceSheet = SpreadsheetApp.getActiveSpreadsheet().getSheets()[0];
  var destSheet = SpreadsheetApp.getActiveSpreadsheet().getSheets()[1];
  
  var source = sourceSheet.getRange("A7:C10");
  var destination = destSheet.getRange("C4:H2");
  moveRange(source,destination);
}

Thanks