如何利用JavaScript正则表达式验证网址

JavaScript011

如何利用JavaScript正则表达式验证网址,第1张

用JavaScript的正则表达式验证网址格式是否正确,方法很多,这只是一个实现的方法.

代码如下:

<script type="text/javascript">

function IsUrl(str){

var regUrl = /(http\:\/\/)?([\w.]+)(\/[\w- \.\/\?%&=]*)?/gi

var result = str.match(regUrl)

if(result!=null) {alert( "Yes ")}

else {alert( "No! ")}

}

</script>

<script type="text/javascript ">

function IsUrl(str){

var regUrl = /(http\:\/\/)?([\w.]+)(\/[\w- \.\/\?%&=]*)?/gi

var result = str.match(regUrl)

if(result!=null) {alert( "Yes ")}

else{alert( "No! ")}

}

</script>

调用方法：

<Form name= "bao ">

<input TYPE= "text " NAME= "txt ">

<Input TYPE=BUTTON value= "TestURL " onClick= "IsUrl(document.bao.txt.value) ">

</FORM>

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)

//re.test()

if (re.test(str_url)){

return (true)

}else{

return (false)

}

}