function show(text) {    
  hide("SM1");
  hide("SM2");
  hide("SM3");
  hide("SM4");
  hide("SM5");
  hide("SM6");
  hide("SM7");

  if(document.getElementById) {
    document.getElementById(text).style.visibility = "visible";
  }
  if(document.all) {      
    obj=eval(text);
    obj.style.visibility = "visible";
  }
} 
 
function hide(text) {    
  if(document.getElementById) {
    document.getElementById(text).style.visibility = "hidden";
  }
  if(document.all) {
    obj=eval(text);
    obj.style.visibility = "hidden";
  }
}