function ShowClients(){
HideAll();
document.getElementById("clients").style.visibility = "visible";
document.getElementById("clientstab").style.backgroundImage = "url(Images/TabOn.jpg)";
document.getElementById("clientstab").style.color = "#000000";
}

function ShowResearch(){
HideAll();
document.getElementById("research").style.visibility = "visible";
document.getElementById("researchtab").style.backgroundImage = "url(Images/TabOn.jpg)";
document.getElementById("researchtab").style.color = "#000000";
}

function ShowReference(){
HideAll();
document.getElementById("reference").style.visibility = "visible";
document.getElementById("referencetab").style.backgroundImage = "url(Images/TabOn.jpg)";
document.getElementById("referencetab").style.color = "#000000";
}

function HideAll(){
document.getElementById("clients").style.visibility = "hidden";
document.getElementById("reference").style.visibility = "hidden";
document.getElementById("research").style.visibility = "hidden";

document.getElementById("clientstab").style.backgroundImage = "url(Images/TabOff2.jpg)";
document.getElementById("referencetab").style.backgroundImage = "url(Images/TabOff2.jpg)";
document.getElementById("researchtab").style.backgroundImage = "url(Images/TabOff2.jpg)";
}