function setht()
{
var hobj;
hobj=document.getElementById('header');
hobj.height=newImg.height;
//alert(hobj.height);
}
function switchMenu(obj) {  
  var el = document.getElementById(obj);  
  if ( el.style.display != "none" ) {  
    el.style.display = 'none';  
  }  
  else {  
    el.style.display = 'block';  
  }  
}