function nav()
{
document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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document.write(' |
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document.write(' | ');
document.write(' |
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}