/* ------------------ Uploader ------------------ */
//Check Upload Fields
function check_upload_fields() {
	var file = document.getElementById("file").value;
	if(file.length == 0) {
		alert("Error: You must select a file before you continue.");
		return false;
	}
}

//Check Upload Extension
function check_upload_ext() {
	var file_name = document.getElementById("file").value;
	browser = navigator.appName;
		var xmlHttp;
			if(browser == "Netscape"){
					xmlHttp = new XMLHttpRequest();
				} else if(browser == "Microsoft Internet Explorer"){
					xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
			}
		xmlHttp.onreadystatechange = function(){
			if (xmlHttp.readyState == 4) {
				if(xmlHttp.responseText.length > 0) {
					alert(xmlHttp.responseText);
					document.getElementById("file").value = '';
					return false;
				}
			}
		}
	xmlHttp.open("POST","http://knoxius.com/upload/action/check_extension.php",true);
	xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	xmlHttp.send("file_name="+file_name+"");
}