pound sign in javascript

I wanna constrain to input special signs like £ ¬ ¦ in javascript,but they are always displayed in ��� on Page source. How can i let them display correc开发者_Python百科tly and page can be validated ? my page is using utf-8

thanks

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Make sure that:

• You really are using UTF-8 for the page
• You are using UTF-8 for the JS
• Your HTTP headers say you are using UTF-8
• Any <meta> tags you have which mention an encoding say UTF-8

If you can't confirm all of those, you can use: "\u00A3"