var COUPON_xmlHttp;

function COUPON_createXMLHttpRequest() {
  if (window.ActiveXObject) {
    COUPON_xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
  } 
  else if (window.XMLHttpRequest) {
  	COUPON_xmlHttp = new XMLHttpRequest();
  }
}

function COUPON_check(txtCode)
{
	var jStr2Validate = getElement(txtCode).value;
	if(jStr2Validate != '') {
		COUPON_createXMLHttpRequest();    
	  var url = "/includes/ajax/ajax_validate_coupon_code.inc.php?timeStamp=" + new Date().getTime();
	  var queryString = "jCouponCode=" + jStr2Validate;
	  COUPON_xmlHttp.open("POST", url, true);
	  COUPON_xmlHttp.onreadystatechange = COUPON_handleSavedData;
	  COUPON_xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");   
	  COUPON_xmlHttp.send(queryString);
	}
	else {
		alert("Please enter a String to Validate!");				    	
	}
}

function COUPON_handleSavedData()
{
	if(COUPON_xmlHttp.readyState == 4) {
    if(COUPON_xmlHttp.status == 200) {
			getElement("coupon-slot").innerHTML = COUPON_xmlHttp.responseText;
    }
  }
}