Created
February 26, 2014 12:10
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validation example using javascript/
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| <html> | |
| <head> | |
| <title>example javascript</title> | |
| </head> | |
| <body> | |
| <form name="logInForm" method="post" onsubmit="return validate()"> | |
| First name:<input type="text" id="firstName" name="firstName" > | |
| Last name:<input type="text" id="lastName" name="lastName" > | |
| <input type="submit" value="LogIn" id="logIn">////<---------this type comes in pair with onsubtmit attribute!!! | |
| <div id="error"></div> | |
| </form> | |
| <script type="text/javascript" src="do.js"></script> | |
| </body> | |
| </html> | |
| function validate(){ | |
| var error=document.getElementById("error"); | |
| var firstName = document.forms["logInForm"]["firstName"].value; | |
| var lastName = document.forms["logInForm"]["lastName"].value; | |
| if (firstName == "" || firstName == null || lastName == "" || lastName == null){ | |
| error.innerHTML = "the info must be filled out"; | |
| error.style.color = "red"; | |
| return false; | |
| } | |
| } |
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