I'm using Jquery Masked input plugin http://digitalbush.com/projects/masked-input-plugin/
According to the changelog it should support IE7
When when trying to use it on IE7 It's does not work and I'm getting the following error in IE debugger
Object doesn't support property or method 'mask'
My code :
$("#" + "someid").mask(someformat);
The same code work on all other browsers including IE8 and above.