function Switch(item,on) {
var sTmp;
  if (item == "menu1")  {
  if (on)    {
  sTmp = "this.document." + item +".src = \"images/menu_home_on.gif\"";
  eval(sTmp); 
  } else {
  sTmp = "this.document." + item +".src = \"images/menu_home.gif\"";
  eval(sTmp);
  }
  } 
  if (item == "menu2")  {
  if (on)    {
  sTmp = "this.document." + item +".src = \"images/menu_wheretostay_on.gif\"";
  eval(sTmp); 
  } else {
  sTmp = "this.document." + item +".src = \"images/menu_wheretostay.gif\"";
  eval(sTmp);
  }
  }
  if (item == "menu3")  {
  if (on)    {
  sTmp = "this.document." + item +".src = \"images/menu_whattodo_on.gif\"";
  eval(sTmp); 
  } else {
  sTmp = "this.document." + item +".src = \"images/menu_whattodo.gif\"";
  eval(sTmp);
  }
  }
  if (item == "menu4")  {
  if (on)    {
  sTmp = "this.document." + item +".src = \"images/menu_howtogethere_on.gif\"";
  eval(sTmp); 
  } else {
  sTmp = "this.document." + item +".src = \"images/menu_howtogethere.gif\"";
  eval(sTmp);
  }
  }
  if (item == "menu5")  {
  if (on)    {
  sTmp = "this.document." + item +".src = \"images/menu_aboutus_on.gif\"";
  eval(sTmp); 
  } else {
  sTmp = "this.document." + item +".src = \"images/menu_aboutus.gif\"";
  eval(sTmp);
  }
  }

  
  }