function isWhite(txt) 
{
    var c = 0;
    while( c < txt.length ) {
	var ch = txt.charAt(c);
	if( ch != ' ' && ch != '\t' && ch != '\n' ) return false;
	c++;
    }
    return true;
}
/**
 * (for testing purposes) is txt all whitespace
 */
(for testing purposes) is txt all whitespace
( for testing purposes ) is txt all whitespace
function isWhite(txt) 
{
    var c = 0;
    while( c < txt.length ) {
	var ch = txt.charAt(c);
	if( ch != ' ' && ch != '\t' && ch != '\n' ) return false;
	c++;
    }
    return true;
}
function isWhite ( txt ) { var c = 0 ; while ( c < txt . length ) { var ch = txt . charAt ( c ) ; if ( ch != ' ' && ch != '\t' && ch != '\n' ) return false ; c ++ ; } return true ; }
(for testing purposes) is txt all whitespace
( for testing purposes ) is txt all whitespace