// dropdowns //

var currentPage = "";

function show(id,button) {
  var thisimg = document.getElementById(button);
  thisimg.src = thisimg.src.replace(/_on(\.[a-z0-9]+)$/i,'$1');
  thisimg.src = thisimg.src.replace(/(\.[a-z0-9]+)$/i,'_on$1');
  document.getElementById(id).style.visibility = "visible";
  }

function hide(id,button) {
    var page = document.getElementsByTagName('body')[0].id;

    if (currentPage == button) {
      document.getElementById(id).style.visibility = "hidden";
    }
    else {
  var thisimg = document.getElementById(button);
  if (currentPage != button)
    thisimg.src = thisimg.src.replace(/_on(\.[a-z0-9]+)$/i,'$1');
  document.getElementById(id).style.visibility = "hidden";
  }
}



// toggle between the news sections //

function toggle(button) {

  var thisimg = document.getElementById(button);
  var selected = new Array ('butNewsHealth', 'butNewsEducation', 'butNParanting');

  for (var i = 0; i < selected.length ; i++ ) {
  var num = selected[i];
  document.getElementById(num).src = document.getElementById(num).src.replace(/_on(\.[a-z0-9]+)$/i,'$1');
  }

  document.getElementById(button).src = document.getElementById(button).src.replace(/(\.[a-z0-9]+)$/i,'_on$1');

  if (button == 'butNewsHealth') {
     document.getElementById('newstext').style.backgroundColor = "#E4F3E8";
     document.getElementById('newstext').innerHTML = document.getElementById('newshealth').innerHTML;
    }
    else if (button == 'butNewsEducation') {
    document.getElementById('newstext').style.backgroundColor = "#FFF7D9";
  document.getElementById('newstext').innerHTML = document.getElementById('newseducation').innerHTML;
 }
  else {
  document.getElementById('newstext').style.backgroundColor = "#F8C9CB";
  document.getElementById('newstext').innerHTML = document.getElementById('newsparenting').innerHTML;
  }


}

function pageSelect(button) {
  var thisimg = document.getElementById(button);
  thisimg.src = thisimg.src.replace(/(\.[a-z0-9]+)$/i,'_on$1');
  currentPage = button;
  if(document.getElementById("main")){
    var newsDiv = document.getElementById("news");
    var navDiv = document.getElementById("contentnav");
    var mainHeight = document.getElementById("main").offsetHeight;
    if(mainHeight > navDiv.offsetHeight)
      navDiv.style.height = mainHeight +"px";
    if(newsDiv)
      if(mainHeight > newsDiv.offsetHeight)
        newsDiv.style.height = mainHeight +"px";
  }
}

function sortNum(a,b) { return b-a}

function stretchTwo(elOne,elTwo) {
  if (document.getElementById(elOne)) {
    var lh=document.getElementById(elOne).offsetHeight;
    var rh=document.getElementById(elTwo).offsetHeight;
    var nh = Math.max(lh, rh);
    document.getElementById(elOne).style.height=nh+"px";
    document.getElementById(elTwo).style.height=nh+"px";
  }
}

function stretchThree(elOne,elTwo,elThree) {
  if (document.getElementById(elOne)) {
    var obj=new Array(3);
    var option=[elOne,elTwo,elThree];
    for(var i=0; i<option.length; i++) {
      document.getElementById(option[i]).style.height="auto";
      obj[i]=document.getElementById(option[i]).offsetHeight;
      nh=obj.sort(sortNum);
    }
    nh1=nh.splice(1,2);
    for(var i=0; i<option.length; i++) {
      document.getElementById(option[i]).style.height=nh+"px";
    }
  }
}