function overTab(idname, tabimgsrc) {
		document.getElementById(idname).src='/graphics/' + tabimgsrc;
}

function outTab(idname, tabimgsrc) {
		document.getElementById(idname).src='/graphics/' + tabimgsrc;
}

function pushbutton(tabname) {

document.getElementById('partnerstab').style.backgroundImage = "none";
document.getElementById('sponsortab').style.backgroundImage = "none";				 
document.getElementById('driftworldtab').style.backgroundImage = "none";
document.getElementById('motorworldtab').style.backgroundImage = "none";
document.getElementById(tabname).style.backgroundImage = "url(/graphics/links-gradient.gif)";
}