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Word counting with javascript

This simple script counts number of symbols and words in some text. This script consideres the word as any combination of not white space letters.
Here the code of the script:

function isWhiteSymbol(symb)
{
  var ret = false;
  switch(symb)
  {
    case " ":
    case "":
    case"\n":
    case "\r":
      ret = true;
    default:   
  }
 return ret;
}

function Button1_onclick() {

var sometext = document.getElementById("TextArea1").value;
var somelen =sometext.length.toString(10);

var wordcount = 0;
var colnotwhite = 0;

var wordbegin = false;

for(var i=0;i < somelen; i++)
{

 
  if( !isWhiteSymbol(sometext.charAt(i)) )
  {
    colnotwhite = colnotwhite + 1;
    if(wordbegin == false)
     {
       wordcount= wordcount+1;
       wordbegin = true;
     }    
  }
 else
  {   
      wordbegin = false;
  } // end if(sometext.charAt(i) != ' ')  
}//end for
alert("Symbols = " + somelen + "\nSymbols in words = " + 
colnotwhite.toString(10) + "\nWords = " + wordcount.toString(10));

}//end function




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