function submitNum(num){
	var ajaxRequest;  // The variable that makes Ajax possible!
	
	try {
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e) {
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {
				// Something went wrong
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
        //result message can go here
		}
	}
	var emissions = num.replace(',','');
	var getVars = 'emissions=' + emissions;
	ajaxRequest.open("GET", "server.php?" + getVars, true);
	ajaxRequest.send(null); 
	
}

/*

function submitNum(num) {
    var getVars;
    var req;
    var emissions = num.replace(',',''); //strip commas from number
    getVars = 'emissions=' + emissions;
    req = GXmlHttp.create();
    req.open('GET','server.php?'+ getVars,true);
    req.onreadystatechange = function() {
        if (req.readyState < 4)
        {
          //loading message can go here
        }
        if (req.readyState ==4) {
          document.getElementById('submit').style.innerHTML = 'Your submission has been completed.';

        }

  req.send('');

  }
  
}
*/