English 中文(简体)
javaScript 通过正则格式验证文本
原标题:javaScript text validation by regex

我需要检查字符串是否以 java 脚本中的 http:// 开始

我拥有的是

if(!txt.match(/^http:/)) {}  // this only works for http:

我需要让它为 http:// 服务

任何人都能建议一个解决办法吗?

最佳回答

您需要避开 字符, 检查最好使用 < code> test 方法。

if(!(/^http:///.test(txt))) {}
问题回答

或者:

txt.substr(0, 7) === "http://"




相关问题
selected text in iframe

How to get a selected text inside a iframe. I my page i m having a iframe which is editable true. So how can i get the selected text in that iframe.

How to fire event handlers on the link using javascript

I would like to click a link in my page using javascript. I would like to Fire event handlers on the link without navigating. How can this be done? This has to work both in firefox and Internet ...

How to Add script codes before the </body> tag ASP.NET

Heres the problem, In Masterpage, the google analytics code were pasted before the end of body tag. In ASPX page, I need to generate a script (google addItem tracker) using codebehind ClientScript ...

Clipboard access using Javascript - sans Flash?

Is there a reliable way to access the client machine s clipboard using Javascript? I continue to run into permissions issues when attempting to do this. How does Google Docs do this? Do they use ...

javascript debugging question

I have a large javascript which I didn t write but I need to use it and I m slowely going trough it trying to figure out what does it do and how, I m using alert to print out what it does but now I ...

Parsing date like twitter

I ve made a little forum and I want parse the date on newest posts like twitter, you know "posted 40 minutes ago ","posted 1 hour ago"... What s the best way ? Thanx.

热门标签