Customizing validation information for HTML5 checks

In HTML5, a form can define an attribute required to trigger the default checksum mechanism, such as:

<type= "text"/>

The error message that pops up defaults to English.

If you want to customize the language hint, you can:

<type= "text"  required oninvalid= "invalidmsg (this);" />

The JS method is:

function invalidmsg (textbox) {    if (textbox.value = = ') {        textbox.setcustomvalidity (' cannot be empty ');    }     Else if (textbox.validity.typeMismatch) {        textbox.setcustomvalidity (' Please enter a legal email address ')    ;    } Else {       textbox.setcustomvalidity (');    }     return true ;}

Customizing validation information for HTML5 checks