function getUrlParameter(name) {
	var regexS = "[\\?&]"+name+"=([^&#]*)";
	var regex = new RegExp( regexS );
	var tmpURL = window.location.href;
	var results = regex.exec( tmpURL );
	if( results == null )
		return null;
	else
		return results[1];
}

function createCookie(name, value, days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
		var expires = "; expires=" + date.toGMTString();
	}
	else var expires = "";
	document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i = 0; i < ca.length; i++) {
		var c = ca[i];
		while (c.charAt(0) == ' ') c = c.substring(1, c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name, "", -1);
}

function setVisibility(szDivID, iState) { // 1 visible, 0 hidden
	if (document.getElementById) {  // gecko(NN6)+ IE 5+
		var obj = document.getElementById(szDivID);
		obj.style.display = iState ? "block" : "none";
	} else if (document.layers) {  // NN4+
		if (iState == 1) {
			document.layers[szDivID].display = "block";
			document.layers[szDivID].visibility = "show";
		} else {
			document.layers[szDivID].display = "none";
			document.layers[szDivID].visibility = "hidden";
		}
	} else if (document.all) {  // IE4
		if (iState == 1) {
			document.all[szDivID].style.display = "block";
			document.all[szDivID].style.visibility = "visible";
		} else {
			document.all[szDivID].style.display = "none";
			document.all[szDivID].style.visibility = "hidden";
		}
	}
}

function isDigit(num) {
	if (num.length > 1) return false;
	var string = "1234567890";
	if (string.indexOf(num) != -1) return true;
	return false;
}