//Browser Type Check
function user_agent() {
	//var name = navigator.appName;
	var str_agent = navigator.userAgent.toLowerCase();
	var browser_type = "";
	if (str_agent.indexOf("msie") != -1) {
		if (str_agent.indexOf("msie 7.0") != -1) {
			browser_type = "IE"; // IE7
			return browser_type;
		} else {
			browser_type = "IE";
			return browser_type;
		}
	}
	if (str_agent.indexOf("firefox") != -1) {
		browser_type = "FF";
		return browser_type;
	}
	if (str_agent.indexOf("opera") != -1) {
		browser_type = "OP";
		return browser_type;
	}
	if (str_agent.indexOf("konqueror") != -1 || strAgent.indexOf("safari") != -1) {
		browser_type = "SF";
		return browser_type;
	}
	browser_type = "NS"; //Not Support
	return browser_type;
}