function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.0
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function showHelp(url) {
  popupWin = window.open(url, 'Help','width=300,height=220,left=150,top=150,toolbar=no,status=no,scrollbars=yes,location=no');
}

/**************************************************************************************************
' Function:
' Name:        DropDownChange
' Description: Used to link to dropdown onchange events so that it can perform a specific action
'              depending on which option was selected in the drop down.  Note that this function
'              performs different operations depending on what context it is in.
' Parameters:  DropDown - the drop down object
'              Context  - a string to determine what context it is in
' Output:      none
' History:     Date      Developer                 Comments
'--------------------------------------------------------------------------------------------------
'              04/15/03  Patrick Lok (Habaneros)   Created
**************************************************************************************************/
function DropDownChange(DropDown, Context)
{
   /*Get Index and Values*/
   var SelIndex = DropDown.selectedIndex
   var SelValue = DropDown.options[SelIndex].value
   
   /*Depending on what Context, perform an action*/
   switch(Context)
   {
      /*User selected which year to filter News Releases by...*/
      case 'NewsReleaseYear':
         if (SelIndex != ''){top.location.href = '/Inc/Newsroom/Default.htm?year=' + SelValue;}
         break;
      /*User selected which gas region to go to...*/
      case 'GasRegion':
         if (SelValue == '1'){top.location.href = '/Gas/default.htm'}
         if (SelValue == '2'){top.location.href = 'http://gas1.terasen.com'}
         break;
   }
    return true;
}