function togglediv(divId)
{
	var toggleVis = document.getElementById(divId);
	if(toggleVis.style.display == 'block') toggleVis.style.display = 'none';
	else toggleVis.style.display = 'block';
	return;
}

function hidedivs(j,name)
{
	var i=0;
	for (i=0;i<=j;i++)
	{
		var mixdivname = name + i;
		var mixdiv = document.getElementById(mixdivname);
		if(mixdiv.style.display != 'none') mixdiv.style.display = 'none';
	}
	return;
}

function changedivs(j, name, divId , a ,b)
{
	if (a == 1) hidedivs(j, b);
	hidedivs(j,name);
	togglediv(divId);
}

function swapdiv(one,two)
{
	togglediv(one);
	togglediv(two);
}

function chkForm(frm) {
  // the name of the form
  f = frm;

  // change msg to the name of any field you want to make required.
  if (f.Textarea) {
    if (f.Textarea.value == '') {
      alert('Please type a message');
      return false;
    }
  }

  // if 'from' address field is used, this checks it to make sure address is valid
  if (f.email) {
    if (f.email.value != '' && (f.email.value.lastIndexOf('.') < 0 || f.email.value.lastIndexOf('@') < 1)) {
      alert('Invalid e-mail address');
      return false;
    }
    else if (f.email.value == '') {
      return confirm('Are you sure you want to send this message without an email address?');
    }
  }
}



/*function togglediv(divId) {
var toggleVis = document.getElementById(divId);
if(toggleVis.style.display == 'block') toggleVis.style.display = 'none';
else toggleVis.style.display = 'block';
var myImage = document.getElementById(divId + 'head');
if (myImage.style.backgroundImage == 'url(images/minus.gif)') 
myImage.style.backgroundImage = 'url(images/plus.gif)'; 
else myImage.style.backgroundImage = 'url(images/minus.gif)'; 
return;
}

function keystagecolor(showId,hideId) {
var showVis = document.getElementById(showId);
var hideVis = document.getElementById(hideId);
showVis.style.display = 'block';
hideVis.style.display = 'none';
var showBg = document.getElementById(showId + 'head');
var hideBg = document.getElementById(hideId + 'head');
showBg.style.backgroundColor = '#ffffff';
hideBg.style.backgroundColor = '#f0f0f0';
var showBglink = document.getElementById(showId + 'link');
var hideBglink = document.getElementById(hideId + 'link');
showBglink.style.fontWeight = 'bold';
hideBglink.style.fontWeight = 'normal';
return;
}*/