JavaScript校验网址

gistfile1.txt

var linkUrl = 'https://www.baidu.com'
if( typeof (linkUrl) != undefined && linkUrl != ''){
    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 reg = new RegExp(strRegex);
    if(!reg.test(linkUrl.toLowerCase())){
        alert("跳转链接格式错误!");
        return false;
    }
}