function isURL(str_url) {// 驗證url
		var strRegex = "^((https|http|ftp|rtsp|mms)?://)"
		+ "?(([0-9a-z_!~*'().&=+$%-]+: )?[0-9a-z_!~*'().&=+$%-][email protected])?" // ftp的[email protected]
		+ "(([0-9]{1,3}\.){3}[0-9]{1,3}" // IP形式的URL- 199.194.52.184
		+ "|" // 允許IP和DOMAIN（域名）
		+ "([0-9a-z_!~*'()-]+\.)*" // 域名- www.
		+ "([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\." // 二級域名
		+ "[a-z]{2,6})" // first level domain- .com or .museum
		+ "(:[0-9]{1,4})?" // 埠- :80
		+ "((/?)|" // a slash isn't required if there is no file name
		+ "(/[0-9a-z_!~*'().;?:@&=+$,%#-]+)+/?)$";
		var re = new RegExp(strRegex);
		return re.test(str_url);
	}