// Button Rollover Code
function rollOverNew(imgID, imgName) {
	document.getElementById(imgID).setAttribute('src', imgName);
}

// Toggle blanket for enlarged images (jpgs)
function toggleBlanketImage(imgSrc) {
  var blanket = document.getElementById('blanketWrpr');
  var lbDisplay = blanket.className;
  document.getElementById('blanketChart').setAttribute('src', '/images/' + imgSrc + '_big.jpg');
  
  if (lbDisplay == 'displayNone') {
    blanket.className = 'displayBlock';
  } else {
    blanket.className = 'displayNone';
  }
}

// Page redirect for filter drop-down
function goThere(){
  var list = document.filters.typeFilter;
  location = list.options[list.selectedIndex].value;
}

// Get URL parameter
function getParam(name) {
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( window.location.href );
  if( results == null )
    return "";
  else
    return results[1];
}