document.write('
');
document.write('
');
document.write('if ( window.functionName )
');
document.write('{
');
document.write(' functionName()
');
document.write('}
');
document.write('else
');
document.write('{
');
document.write(' alert( \'function not found\' )
');
document.write('}
');
document.write('
');
document.write('
');
document.write('
');