var portStyle;
function initPortfolioNav(){ if(document.getElementById) portStyle = document.getElementById("portfolio_nav").style; else if(document.all) portStyle = document.all['portfolio_nav'].style; else if(document.layers) portStyle = document.layers['portfolio_nav'];}
function hidePortfolioNav(){portStyle.visibility = "hidden"; if(portStyle.display) portStyle.display = 'none';}
function showPortfolioNav(){portStyle.visibility = "visible"; if(portStyle.display) portStyle.display = '';}
var aboutStyle;
function initAboutNav(){ if(document.getElementById) aboutStyle = document.getElementById("about_nav").style; else if(document.all) aboutStyle = document.all['about_nav'].style; else if(document.layers) aboutStyle = document.layers['about_nav'];}
function hideAboutNav(){aboutStyle.visibility = "hidden"; if(aboutStyle.display) aboutStyle.display = 'none';}
function showAboutNav(){aboutStyle.visibility = "visible"; if(aboutStyle.display) aboutStyle.display = '';}
var contactStyle;
function initContactNav(){ if(document.getElementById) contactStyle = document.getElementById("contact_nav").style; else if(document.all) contactStyle = document.all['contact_nav'].style; else if(document.layers) contactStyle = document.layers['contact_nav'];}
function hideContactNav(){contactStyle.visibility = "hidden"; if(contactStyle.display) contactStyle.display = 'none';}
function showContactNav(){contactStyle.visibility = "visible"; if(contactStyle.display) contactStyle.display = '';}