function shipsame(form){

if(form.sameasbilling.checked){

     form.shippingfirstname.value = form.billingfirstname.value;
     form.shippinglastname.value = form.billinglastname.value;
     form.shippingphone.value = form.billingphone.value;
     form.shippingaddress.value = form.billingaddress.value;
     form.shippingaddress2.value = form.billingaddress2.value;	 	 
     form.shippingcity.value = form.billingcity.value; 
     form.shippingzip.value = form.billingzip.value;
     
     if(form.billingstate.type == "select-one"){
          var bStateIdx = form.billingstate.selectedIndex;
          form.shippingstate.options[bStateIdx].selected = true;
     }
     else{
          form.shippingstate.value = form.billingstate.value;
     }
	 
     if(form.billingcountry.type == "select-one"){
          var bStateIdx = form.billingcountry.selectedIndex;
          form.shippingcountry.options[bStateIdx].selected = true;
     }
     else{
          form.shippingcountry.value = form.billingcountry.value;
     }
}
else{
     form.shippingfirstname.value = "";
     form.shippinglastname.value = "";
     form.shippingphone.value = "";
	 form.shippingaddress.value = "";
     form.shippingaddress2.value = "";	 	 
     form.shippingcity.value = "";
     if(form.shippingstate.type == "select-one"){
          form.shippingstate.options[0].selected = true;
     }
     else{
          form.shippingstate.value = "";
     }
     if(form.shippingcountry.type == "select-one"){
          form.shippingcountry.options[0].selected = true;
     }
     else{
          form.shippingcountry.value = "";
     }
     form.shippingzip.value = "";
}
}

// show/hide
function toggleDisplay(el)
{
myEl = document.getElementById(el);
myEl.style.display = (myEl.style.display == 'block') ? 'none' : 'block';
}
<!--
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];}
}
//-->