var window_Height= window.screen.height;
var stylesheet = document.getElementById("pagestyle");
if (/MSIE[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{
var IEversion=new Number(RegExp.$1) // capture x.x portion and store as a number
if (IEversion>=8)
{
  stylesheet.href="StyleSheet/UNZA_StyleSheet.css";
}
else if (IEversion==7)
{
  stylesheet.href="StyleSheet/UNZA_StyleSheet_IE7.css";
}
else if (IEversion==6)
{
  stylesheet.href="StyleSheet/UNZA_StyleSheet_ie6.css";

}
else if (IEversion<=5)
{
  stylesheet.href="StyleSheet/UNZA_StyleSheet_ie6.css";
}
}
else if(/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{
stylesheet.href="StyleSheet/UNZA_StyleSheet_Minefield_3_6.css";
}
else if(/Chrome[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{
stylesheet.href="StyleSheet/UNZA_StyleSheet_Minefield_3_6.css";
}
else if(/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{
stylesheet.href="StyleSheet/UNZA_StyleSheet_Minefield_3_6.css";
}
else if(/Safari[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{
var Safariversion=new Number(RegExp.$1) 

if(Safariversion ==525.21)
{
stylesheet.href="StyleSheet/UNZA_StyleSheet_Safari_3_1_2.css";
}
else if(Safariversion==530.17)
{
stylesheet.href="StyleSheet/UNZA_StyleSheet_Safari4.css";
}
}
else if(/Minefield[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{
var Minefieldversion=new Number(RegExp.$1); 
if(Minefieldversion ==3.6)
{
   stylesheet.href="StyleSheet/UNZA_StyleSheet_Minefield_3_6.css";
}
else if(Minefieldversion ==3.7)
{
   stylesheet.href="StyleSheet/UNZA_StyleSheet_Minefield_3_6.css";
}
}