shank888 Posted May 17, 2007 Share Posted May 17, 2007 It looks to me there is alot of form validation help. and it looks like there is a few ways of doing this. I am making a form to create a pop-up when the values entered are incorrect. here is my code: <html> <head> <title> Babble-net validator</title> <script type="javascript"> function validate() { if (document.register.username.value == "" || " ") { alert("Invalid Username"); document.register.username.focus(); return false; } } </script> </head> <body> <form name='register' id='register'> Username: <input type='text' id='username' name='username'/> <input type='submit' value='register' name='go' id='go' onsubmit="Validate();"/> </form> </body> Quote Link to comment Share on other sites More sharing options...
xenophobia Posted May 18, 2007 Share Posted May 18, 2007 function IsEmpty(aTextField) { if ((aTextField.length==0) || (aTextField==null)){ return true; }else{ for(var i=0; i<aTextField.length; i++){ if(aTextField.charAt(i) != " "){ return false; } } return true; } } Use this function to validate an empty fields: function validate() { if (IsEmpty(document.register.username.value)) { alert("Invalid Username"); document.register.username.focus(); return false; } } A lots of validation function out there. Try search through the web. Quote Link to comment Share on other sites More sharing options...
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