function display_taxes(){
	document.getElementById("error_mesg").style.display="none";
	document.getElementById("tax_table").style.display="none";
	var zip=document.getElementById("zip").value;

	if (!is_valid_zip(zip)){
		document.getElementById("error_mesg").innerHTML="Please enter a valid ZIP code";
		document.getElementById("error_mesg").style.display="block";
		return false;
	}else{
	
		document.getElementById("phone_lookup_progress").innerHTML="&nbsp;<img align='absmiddle' src=\"" + '/images/ajaxindicator.gif' + "\" />";
		
		var params = "zip=" + zip

        make_post_request('/ajax/get_taxinfo.php', params);

		setTimeout(function(){show_tax_table();}, 1000);
	 }
}

function is_valid_zip(zip) {
	var reZip = new RegExp(/(^\d{5}$)|(^\d{5}-\d{4}$)/);
    return reZip.test(zip)
}

function show_tax_table(){
	document.getElementById("phone_lookup_progress").innerHTML="";
	document.getElementById("tax_table").style.display="block";

}

var http_request=false;

function make_post_request(url, parameters) {
	http_request = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/html');
        }
    } 
	else if (window.ActiveXObject) { // IE
    	try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
     }
     
	if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }
      
      http_request.onreadystatechange = alert_contents;
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

   function alert_contents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            var result = http_request.responseText;
			var amounts=result.split(",");
			
			document.getElementById('RCCRF_amount').innerHTML=amounts[0];
			document.getElementById('911CRF_amount').innerHTML=amounts[1];
			document.getElementById('FUSF_amount').innerHTML=amounts[2];
			document.getElementById('SALT_amount').innerHTML=amounts[3];
			document.getElementById('total_amount').innerHTML=amounts[4];

         } else {
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(obj) {
      var poststr = "mytextarea1=" + encodeURI( document.getElementById("mytextarea1").value ) +
                    "&mytextarea2=" + encodeURI( document.getElementById("mytextarea2").value );
      makePOSTRequest('post.php', poststr);
   }