function makeVisible(divID) {
document.getElementById("graphic").style.background = "transparent url(../fallsfromvehicles/images/primary.png) -780px 0 no-repeat";
document.getElementById("introdetails").className = "hide";
document.getElementById(divID).className = "boxdetails";
};

function makeHidden(divID) {
document.getElementById("graphic").style.background = "transparent url(../fallsfromvehicles/images/primary.png) 0 0 no-repeat";
document.getElementById(divID).className = "hide";
document.getElementById("introdetails").className = "boxdetails";
};