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form input field that only accepts numbers
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> | |
| <script type="text/javascript"> | |
| $( document ).ready( function () { | |
| console.log("ready"); | |
| // check to see if an object with class .date has lost focussed. if so check | |
| // the value of the input for the date type dd/mm/yyyy (only 1900-2099) | |
| $(".date").blur( function (e) { | |
| var dateRegex = /^(0[1-9]|1\d|2\d|3[01])\/(0[1-9]|1[0-2])\/(19|20)\d{2}$/ ; | |
| var fieldValue = $(e.target).val(); | |
| if (dateRegex.test(fieldValue)) { | |
| // validation passed | |
| console.log("good value"); | |
| } else { | |
| // validation failed | |
| console.log("bad value"); | |
| } | |
| }); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <form> | |
| <input type="text" name="age" class="date" placeholder="dd/mm/yyyy"> | |
| </form> | |
| </body> | |
| </html> |
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