var y;
if (self.innerHeight) // all except Explorer
{
y = self.innerHeight;
}
else if (document.documentElement && document.documentElement.clientHeight)
// Explorer 6 Strict Mode
{
y = document.documentElement.clientHeight;
}
else if (document.body) // other Explorers
{
y = document.body.clientHeight;
}

// add final stylesheet if height demands
if (y > 560)
{
document.write('<style type="text/css">@import "css/high.css";</style>')
}