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;    }}