Other form values are available using a similar syntax, although this becomes more complicated if you're using SELECT lists, checkboxes or radio buttons (see below for examples). All you need to do is extend the command is encountered, execution of the function is halted.In other words if the first condition fails, the second condition will not be tested and so forth.Explain to your user what is wrong and suggest solutions.
There are various validation schemes for checking the other type of validations, like check for all or no, checking for all letters and numbers and restricting the length of field.
Firefox and Safari had moderate support, and Internet Explorer had no support at all.
For each type of input element, we use the code to detect if your browser supports it. You should normally supply all of value, min, and max.
The beauty of these elements is that you can use them now: for browsers that don't support a particular input type, there is automatic fallback to standard textfields.
There are two keys to understanding why the automatic fallback works consistently in all major browsers: (unless "foo" is a recognized input type or "bar" is a recognized attribute of the input element).