function getStyleObject(objectId) {
    if(document.getElementById && document.getElementById(objectId)) {
	return document.getElementById(objectId).style;
    } else if (document.all && document.all(objectId)) {
	return document.all(objectId).style;
    } else if (document.layers && document.layers[objectId]) {
	return document.layers[objectId];
    } else {
	return false;
    }
}
function changeObjectVisibility(objectId, newVisibility) {
    var styleObject = getStyleObject(objectId);
    if(styleObject) {
	styleObject.visibility = newVisibility;
	return true;
    } else {
	return false;
    }
}
function hideDiv (){
changeObjectVisibility('div1',	'hidden');
changeObjectVisibility('div2',	'hidden');
changeObjectVisibility('div3',	'hidden');
changeObjectVisibility('div4',	'hidden');
changeObjectVisibility('div5',	'hidden');
changeObjectVisibility('div6',	'hidden');
}
function showDiv1 (){
  changeObjectVisibility('div1',	'visible');
  changeObjectVisibility('div2',	'hidden');
  changeObjectVisibility('div3',	'hidden');
  changeObjectVisibility('div4',	'hidden');
  changeObjectVisibility('div5',	'hidden');
  changeObjectVisibility('div6',	'hidden');
}

function showDiv2 (){
  changeObjectVisibility('div1',	'hidden');
  changeObjectVisibility('div2',	'visible');
  changeObjectVisibility('div3',	'hidden');
  changeObjectVisibility('div4',	'hidden');
  changeObjectVisibility('div5',	'hidden');
  changeObjectVisibility('div6',	'hidden');
}

function showDiv3 (){
  changeObjectVisibility('div1',	'hidden');
  changeObjectVisibility('div2',	'hidden');
  changeObjectVisibility('div3',	'visible');
  changeObjectVisibility('div4',	'hidden');
  changeObjectVisibility('div5',	'hidden');
  changeObjectVisibility('div6',	'hidden');
}

function showDiv4 (){
  changeObjectVisibility('div1',	'hidden');
  changeObjectVisibility('div2',	'hidden');
  changeObjectVisibility('div3',	'hidden');
  changeObjectVisibility('div4',	'visible');
  changeObjectVisibility('div5',	'hidden');
  changeObjectVisibility('div6',	'hidden');
}

function showDiv5 (){
  changeObjectVisibility('div1',	'hidden');
  changeObjectVisibility('div2',	'hidden');
  changeObjectVisibility('div3',	'hidden');
  changeObjectVisibility('div4',	'hidden');
  changeObjectVisibility('div5',	'visible');
  changeObjectVisibility('div6',	'hidden');
 
}

function showDiv6 (){
  changeObjectVisibility('div1',	'hidden');
  changeObjectVisibility('div2',	'hidden');
  changeObjectVisibility('div3',	'hidden');
  changeObjectVisibility('div4',	'hidden');
  changeObjectVisibility('div5',	'hidden');
  changeObjectVisibility('div6',	'visible');
}