View source for Template:CenturyNav

<includeonly>{| class="timeline"
|-
| style="margin-left: 0px;margin-top:2px;line-height:110%;text-align:center; font-size:150%;"|[[Timeline]]
|-
|{{#switch:{{PAGENAME}}
|1st century=previous: [[BC#Timeline|BC years]] next: [[{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|1}}+1}}}} century]] 
|#default= {{#switch:{{#pos:{{PAGENAME}}|c}}
|4=previous: [[{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|1}}-1}}}} century]] next: [[{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|1}}+1}}}} century]] 
|7|6=<div id=ssh style=text:align:center>[[Far future]]</div>
|#default=previous: [[{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|2}}-1}}}} century]] next: [[{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|2}}+1}}}} century]] }}
}}
|-
|style="margin-left: 0px;margin-top:2px;line-height:110%;text-align:center; font-size:110%;"|Years of interest
|-
|{{YearList}}
|}
{{#switch:{{#pos:{{PAGENAME}}|c}}
|4=[[Category:{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|1}}}}}} century| *]][[Category:Centuries]] 
|6=[[Category:{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|3}}}}}} century| *]][[Category:Centuries]] 
|7=[[Category:{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|4}}}}}} century| *]][[Category:Centuries]] 
|#default=[[Category:{{nth|{{#expr:{{#sub:{{PAGENAME}}|0|2}}}}}} century| *]][[Category:Centuries]]
|suppresserrors=true
}}</includeonly>
<noinclude>{{documentation}}[[Category:Timeline templates|C]][[Category:Templates that add a category]]
 
next up is how to get the thing to work for centuries with 1 digit and 3 digits.  Probably will use some kind of #switch. Something like #switch:{{#pos:{{PAGENAME}}|c. Then if the position of c is 5 it's a 1 digit century. if it's 7 it's a 3 digit century. and therefore the sub will have to take either the first, or the first 3 digits. </nowiki></noinclude>