var num = 5; // this is # of divs you have
function swap(what)
{
for(var i = 0; i < num; i++)
{
document.getElementById('swap'+i).style.display = 'none';
}
document.getElementById('swap'+what).style.display = 'block';
}
var createStyle = document.createElement('style');
var createStyleProp = document.createTextNode('.hidden { display:none; }');
createStyle.appendChild(createStyleProp);
document.getElementsByTagName('head')[0].appendChild(createStyle);

function htext(what)
{
for(var i = 0; i < num; i++)
{
document.getElementById('htext'+i).style.display = 'none';
}
document.getElementById('htext'+what).style.display = 'block';
}
var createStyle = document.createElement('style');
var createStyleProp = document.createTextNode('.hidden { display:none; }');
createStyle.appendChild(createStyleProp);
document.getElementsByTagName('head')[0].appendChild(createStyle);

function stext(what)
{
for(var i = 0; i < num; i++)
{
document.getElementById('stext'+i).style.display = 'none';
}
document.getElementById('stext'+what).style.display = 'block';
}
var createStyle = document.createElement('style');
var createStyleProp = document.createTextNode('.hidden { display:none; }');
createStyle.appendChild(createStyleProp);
document.getElementsByTagName('head')[0].appendChild(createStyle);

function itext(what)
{
for(var i = 0; i < num; i++)
{
document.getElementById('itext'+i).style.display = 'none';
}
document.getElementById('itext'+what).style.display = 'block';
}
var createStyle = document.createElement('style');
var createStyleProp = document.createTextNode('.hidden { display:none; }');
createStyle.appendChild(createStyleProp);
document.getElementsByTagName('head')[0].appendChild(createStyle);

function ntext(what)
{
for(var i = 0; i < num; i++)
{
document.getElementById('ntext'+i).style.display = 'none';
}
document.getElementById('ntext'+what).style.display = 'block';
}
var createStyle = document.createElement('style');
var createStyleProp = document.createTextNode('.hidden { display:none; }');
createStyle.appendChild(createStyleProp);
document.getElementsByTagName('head')[0].appendChild(createStyle);