input text - set min length or disable submit if empty

Worker Joined: Dec 23, 2005 Posts: 226 Location: UK

Is there a way to set a minimum length for an input string or to disable the submit button if no text is entered?

I've found max-length but read that min-length doesn't work in php

registered · Posted: Sat Dec 23, 2006 9:33 am

javascript?

Posted: Sun Dec 24, 2006 9:28 am

Quote:

I've found max-length but read that min-length doesn't work in php

This has nothing to do with PHP. You have to do it client-side (as djmaze is eluding to). The way I would probably approach it is to have the submit button enabled set to "false" to start and then upon the onkeypress event for the text field (the input field), check the length of the text in the input field and if it is >0, set the button enabled to "true".

This should give you a head start. Get a good book on Javascript. My favorite is the JavaScript Bible. It is an excellent reference manual (although I am not where I have my book in front of me at the moment).

Posted: Sun Dec 24, 2006 1:37 pm

Yep, this should be moved to javascript

Found the answer

Code:

<s cript type="text/javas cript"><!--


function checkifempty(){


if (document.formname.inputtextname.value=='')


document.formname.buttonname.disabled=true


else


document.formname.buttonname.disabled=false


}


if (document.all || document.getElementById)


setInterval("checkifempty()",100)


//--></s cript>