var reEmail = /^.+\@.+\..+$/
var defaultEmptyOK = false
function isEmpty(s)
{ return ((s == null) || (s.length == 0))
}

function isEmail (s)
{ if (isEmpty(s))
    if (isEmail.arguments.length == 1) return defaultEmptyOK;
    else return (isEmail.arguments[1] == true);
  else
  { return reEmail.test(s)
  }
}

function validasisearch(form)
{ if (form.keyword.value.length < 3)
  { alert("Error: minimal 3 karakter");
    form.keyword.focus();
    return false;
  }
  document.location = '/search.php?keyword=' + form.keyword.value;
  return false;
}
function validasinewsletter(form)
{ if (!isEmail(form.emailnews.value))
  { alert("Email harus valid (contoh: nama@namaperusahaan.com)");
    form.emailnews.focus();
    return false;
  }
  return true;
}

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];}
}

function changeVal(form)
{ tresult = form.val1.value * kurs;
  form.val2.value=formatCurrency(tresult);
}
<!-- Original:  Cyanide_7 (leo7278@hotmail.com) -->
<!-- Web Site:  http://www7.ewebcity.com/cyanide7 -->
function formatCurrency(num) {
  num = num.toString().replace(/\$|\,/g,'');
  if(isNaN(num))
  num = "0";
  sign = (num == (num = Math.abs(num)));
  num = Math.floor(num*100+0.50000000001);
  cents = num%100;
  num = Math.floor(num/100).toString();
  for (var i = 0; i < Math.floor((num.length-(1+i))/3); i++)
  num = num.substring(0,num.length-(4*i+3))+','+ num.substring(num.length-(4*i+3));
  return (((sign)?'':'-') + num);
}