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professional-javascript-10-DOMRangeExample2.htm / htm

          <title>DOM Range Example</title>
          <script type="text/javascript">
              function useRanges() {
                  var oRange1 = document.createRange();
                  var oRange2 = document.createRange();
                  var oP1 = document.getElementById("p1");
                  var iP1Index = -1;
                  for (var i=0; i < oP1.parentNode.childNodes.length; i++) {
                      if (oP1.parentNode.childNodes[i] == oP1) {
                          iP1Index = i;
                  oRange1.setStart(oP1.parentNode, iP1Index);
                  oRange1.setEnd(oP1.parentNode, iP1Index + 1);
                  oRange2.setStart(oP1, 0);
                  oRange2.setEnd(oP1, oP1.childNodes.length);
                  document.getElementById("txtStartContainer1").value = oRange1.startContainer.tagName;
                  document.getElementById("txtStartOffset1").value = oRange1.startOffset;
                  document.getElementById("txtEndContainer1").value = oRange1.endContainer.tagName;
                  document.getElementById("txtEndOffset1").value = oRange1.endOffset;
                  document.getElementById("txtCommonAncestor1").value = oRange1.commonAncestorContainer.tagName;
                  document.getElementById("txtStartContainer2").value = oRange2.startContainer.tagName;
                  document.getElementById("txtStartOffset2").value = oRange2.startOffset;
                  document.getElementById("txtEndContainer2").value = oRange2.endContainer.tagName;
                  document.getElementById("txtEndOffset2").value = oRange2.endOffset;
                  document.getElementById("txtCommonAncestor2").value = oRange2.commonAncestorContainer.tagName;
      <body><p id="p1"><b>Hello</b> World</p>
          <input type="button" value="Use Ranges" onclick="useRanges()" />        
          <table border="0">
                      Start Container: <input type="text" id="txtStartContainer1" /><br />
                      Start Offset: <input type="text" id="txtStartOffset1" /><br />
                      End Container: <input type="text" id="txtEndContainer1" /><br />
                      End Offset: <input type="text" id="txtEndOffset1" /><br />
                      Common Ancestor: <input type="text" id="txtCommonAncestor1" /><br />    
                      Start Container: <input type="text" id="txtStartContainer2" /><br />
                      Start Offset: <input type="text" id="txtStartOffset2" /><br />
                      End Container: <input type="text" id="txtEndContainer2" /><br />
                      End Offset: <input type="text" id="txtEndOffset2" /><br />
                      Common Ancestor: <input type="text" id="txtCommonAncestor2" /><br />
          <p><strong>Note:</strong> This example uses DOM ranges and will only work in browsers that support DOM ranges. This example will fail in Internet Explorer.</p>

(C) Æliens 20/2/2008

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