GUID Validation From UI

Question

Hello Experts,

 

i have below textbox i want to validate GUID.

In below Pattern is not working.

help me for validate guid from UI 

 

<form> 

<input type="text" class="form-control" id="txtid" name="txtid" pattern="[0-9A-Fa-f]{8}\-[0-9A-Fa-f]{4}\-[0-9A-Fa-f]{4}\-[0-9A-Fa-f]{4}\-[0-9A-Fa-f]{12}$" title="Enter valid Guid" required/> 

 

 

<Button> Go </Button> 

 </form>

 

Thanks