Javascript code for validating date format

12-Nov-2017 01:38 by 10 Comments

Javascript code for validating date format - css to sass online dating

The code behind the form now is as follows: If you're not already familiar with regular expressions, then this might be getting a bit complicated.

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As we've seen before, creating re-usable functions can significantly reduce the size of your Java Script code.

In this example, the date fields will only accept input that matches the pattern 'dd/mm/yyyy' (this could just as easily be changed to 'yyyy-mm-dd' or 'mm/dd/yyyy').

The time field will allow input starting with 'hh:mm' following by an optional 'am' or 'pm'. The code behind the form is as follows: For each field in the form (first the dates, then the time field), a check is made as to whether the input is blank.

If not, the input is compared to the regular expression.

The expressions use a pre-defined class is returned which enables the form to be submitted.

When setting options via HTML attributes, remember to enable the validator by setting data-fv-date="true".

You don't need to do that when using HTML 5 type="date" attribute (the format then will be forced to be YYYY-MM-DD).//Begin function checkdate function checkdate(input) //Begin function button1_onclick //This makes sure that even if it somehow got past the original error check, //the report won't run unless the date format is correct.function button1_onclick(ctrl) //End function button1_onclick //This goes in the BODY portion of the HTML Add this phrase to any date control you want to call the function from: on Change="checkdate(this)" //We had to use onchange instead of onblur //because our call center software was interfering //with HTML code and causing the control to lose focus - // we ended up in an infinite loop of error messages.These functions can even be included from an external javascript file so that the browser can cache them, and so the programmer isn't always copying and pasting.In this case, we've created a stand-alone functions which will validate a date field: In each case the value passed to the function is the form field rather than the field value.//-------------------------------------------------------------------------- function check Entered Dates(stdateval,endateval) //-------------------------------------------------------------------------- //This function validates the date for MM/DD/YYYY format.

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