// JavaScript Document


//enables clearinput box for email signup
function clearInputBox (id)
{
    if (document.getElementById && document.createElement) {
        document.getElementById(id).value = "";
    }
}

//END 

//enables menu dropdowns

function showDrop(dropID){
	elem = document.getElementById(dropID);
	elem.style.display='block';
}

function hideDrop(dropID){
	elem = document.getElementById(dropID);
	elem.style.display='none';
}

//END 

//enables zip calc 

function zip_cta() {
  var url = '';
  var hash = '';
  if (document.getElementById('zip_cta_calc_type_individual').checked) {
    url = 'http://www.carbonfund.org/Calculators/';
    hash = '#Home';
  } else if (document.getElementById('zip_cta_calc_type_business').checked) {
    url = 'http://www.carbonfund.org/business/calculator/';
    hash = '#Office';
  }
  url += '?zip_code=' + document.getElementById('zip_cta_zip_code').value + hash;
  
  window.location.href = url;
  
  return false;
}

//end zip calc

//rollovers

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) { //v4.01
  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 && d.getElementById) x=d.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];}
}
//end rollovers