DOM2 Reference
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Node.hasChildNodes

Text in the first DIV.
Some text in the second DIV.
Some text and element in the third DIV.
We can try another elements. It will be much more interesting.
Text in the last DIV.
Source: 
       <div id="doc">
         <div>
           Text in the first DIV.
         </div>
         <div id="DDD" class="secondClass">
           Some text in the second DIV.
         </div>
         <div class="thirdClass">
           Some text and <span id="SSS">element</span> in the third DIV.
         </div>
         <div class="fourthClass">
           We can try <i>another elements</i>.
           It will be much more <b>interesting</b>.
         </div>
         <div>
           Text in the last DIV.
         </div>
       </div>
JavaScript: 
  var main = document.getElementById('doc');
  var output1 = main.hasChildNodes();
  var output2 = main.firstChild.hasChildNodes();
Output:
desired your browser
white-spaces
preserved
by default 		output1: true
output2: false
white-spaces
not-preserved
by default 		output1: true
output2: true


Remarks:
  • it seems that all relevant browsers support JavaScript try-catch statement therefore all examples are encapsulated with it (it avoids alert-popups)
  • thanks to White Space Handling in XML 1.0 specification default handling of white-spaces completely depends on XML application (note: WinIE do not preserve white-spaces by default while MacIE and Mozilla does)
  • during development tested with Mozilla night-builds, Netscape6, MicrosoftInternetExplorer5.5 and Opera5.02 on Windows2000



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