使输入类型=“密码”在移动设备上使用数字板

On my site designed for mobile devices I have an input field that is used for PIN numbers. I want the text to be hidden as it is entered and I want the number pad to pop up when the user on the mobile device wants to enter the PIN. The number pad pops up when Type="Number" but not when Type="Password" and I can't (Or don't know how to) set Type="Number and Password".On my site designed for mobile devices I have a