javascript正则表达式验证IP，URL

function isIP(ipstr){
	var reg = /^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$/g;
	return ipstr.match(reg);
}

function IsURL(str_url){
	var strRegex = ‘^((https|http|ftp|rtsp|mms)?://)‘ 
			+‘?(([0-9a-z_!~*().&=+$%-]+: )?[0-9a-z_!~*().&=+$%-]+@)?‘ //ftp的user@
			+ ‘(([0-9]{1,3}.){3}[0-9]{1,3}‘ // IP形式的URL- 199.194.52.184
			+ ‘|‘ // 允许IP和DOMAIN（域名）
			+ ‘([0-9a-z_!~*()-]+.)*‘ // 域名- www.
			+ ‘([0-9a-z][0-9a-z-]{0,61})?[0-9a-z].‘ // 二级域名
			+ ‘[a-z]{2,6})‘ // first level domain- .com or .museum
			+ ‘(:[0-9]{1,4})?‘ // 端口- :80
			+ ‘((/?)|‘ // a slash isn‘t required if there is no file name
			+ ‘(/[0-9a-z_!~*().;?:@&=+$,%#-]+)+/?)$‘;
	var re=new RegExp(strRegex);
	if (re.test(str_url)){
		return (true);
	}else{
		return (false);
	}
}