Test http://www.w3.org/2001/DOM-Test-Suite/level1/core/characterdatareplacedatabegining

<test name='characterdatareplacedatabegining' schemaLocation='http://www.w3.org/2001/DOM-Test-Suite/Level-1 dom1.xsd'>
     <metadata>
          <title>characterdataReplaceDataBeginning</title>
          <creator>NIST</creator>
          <description> The "replaceData(offset,count,arg)" method replaces the characters starting at the specified offset with the specified string. Test for replacement in the middle of the data. Retrieve the character data from the last child of the first employee. The "replaceData(offset,count,arg)" method is then called with offset=5 and count=5 and arg="South". The method should replace characters five thru 9 of the character data with "South". </description>
          <contributor>Mary Brady</contributor>
          <date qualifier='created'>2001-08-17</date>
          <subject resource='http://www.w3.org/TR/1998/REC-DOM-Level-1-19981001/level-one-core#ID-E5CBA7FB'/>
</metadata>
     <var name='doc' type='Document'/>
     <var name='elementList' type='NodeList'/>
     <var name='nameNode' type='Node'/>
     <var name='child' type='CharacterData'/>
     <var name='childData' type='DOMString'/>
     <load var='doc' href='staff' willBeModified='true'/>
     <getElementsByTagName interface='Document' obj='doc' tagname='"address"' var='elementList'/>
     <item interface='NodeList' obj='elementList' index='0' var='nameNode'/>
     <firstChild interface='Node' obj='nameNode' var='child'/>
     <replaceData obj='child' offset='0' count='4' arg='"2500"'/>
     <data interface='CharacterData' obj='child' var='childData'/>
     <assertEquals actual='childData' expected='"2500 North Ave. Dallas, Texas 98551"' id='characterdataReplaceDataBeginingAssert' ignoreCase='false'/>
</test>

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