function shipping_calculator(suburbid,postcode,weight) {

	if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari
		xmlhttp=new XMLHttpRequest();
	} else {	// code for IE6, IE5
  		xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
	}
	xmlhttp.onreadystatechange=function() {

  		if (xmlhttp.readyState==4 && xmlhttp.status==200) {
    		var x = xmlhttp.responseText;
    		//alert(x);
    		if(x==0) {
			
				document.getElementById('posctode_alert').style.color='red';
				document.getElementById('posctode_alert').innerHTML=' invalid';
   				window.setTimeout('resetError()',3000);
    			
    		} else {
    			var y = x.split('|');
    			document.getElementById('shippingrates1').innerHTML=y[1];
    			//document.getElementById('shippingrates_price1').innerHTML=y[0];
    			//document.getElementById('shippingrates_name1').innerHTML=y[1];
    			
    			//if(document.getElementById('posctode_city') && y[2]) {
    			//	document.getElementById('posctode_city').innerHTML=y[2];
    			//	document.getElementById('posctode_city').className='highlight-ok';
    			//} else if(document.getElementById('posctode_city')) {
    			//	document.getElementById('posctode_city').innerHTML='';
    			//	document.getElementById('posctode_city').className='';
    			//}
    			if(y[3]) document.getElementById('shipping_calculator_postcode').value=y[3];
    			else document.getElementById('shipping_calculator_postcode').value='';
    			
				document.getElementById('shippingrates_price1').style.color='green';
				document.getElementById('row_shippingrates').style.backgroundColor='#E3F7DE';
   				window.setTimeout('resetBg()',1000);
   			}
   				
    	}
  	}
	xmlhttp.open("GET","/shipping_calculator.php?suburbid="+suburbid+"&postcode="+postcode+"&weight="+weight,true);
	xmlhttp.send();
}
function resetBg(){
	document.getElementById('shippingrates_price1').style.color='inherit';
	document.getElementById('row_shippingrates').style.backgroundColor='inherit';
}
function resetError(){
	document.getElementById('posctode_alert').style.color='inherit';
	document.getElementById('posctode_alert').innerHTML='';
}