simple form in php

hi all
i want to design a form in php
anyone can help with the code
http://niazmandiha24.com/html_test/index.htm
this is a demo of what i want in(just to show what i need)

part 1 of the code)
if the user does not enters his username

the first submit botton will not work
force the user to type his username
show some symbol like * that he/she dident enters his username
and some symbol show if he typed his username

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part 2)

it will show the text area's according to the numbers



the text area's for email will show according to the numbers exactly after the first submit button not before
that

---------------------------------------------
if the number in drop box is #1

1*5=5
automatically 5 text area for typing email addresses will be open

---------------------------------------------
if the number in drop box is #2
2*5=10
automatically 10 text area for typing email addresses will be open


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by clicking 2nd submit button one copy of email addresses+
the username will be send to one email address suppose

important note 1*)if any of the email addresess filed was not entered, again * symbol
or some symbol or some message displayed that he/she dident type the email addresses
important note 2 *) if the captha code he enters is wrong the 2nd sumbit button will not be appear

note :2nd submit button will apear if every thing is correct

 

<form name="form" method="post">
<input type="text" name="field1">
<button onClick="checkform()">Verify</button>
</form>

Code (markup):

<script type="text/javascript">
function checkform() {
if (document.form.field1.value = '') {
alert('Please enter username !'); }
}
</script>

Code (markup):

Hope it helps a bit Try to do a bit of research on javascript - that's exactly what you need !

 

thanks foe the help dude
what about the drop box condition if number is one...
if the number is 2.....

 

Check this post : webmaster-talk.com/javascript-forum/52512-changing-a-variable-dropdown-onchange-function.html#post249606
I don't want to copy/paste it's content here

 

you are really helpfull
iam reading ot i hope this is what i want
thanks for your quick help
please make this topic instant emailnotification
i ask my questions from you

 

dude i dident undrestand the code at all
it does not do anthing
check this

www.niazmandiha24.com/html_test/index2.htm

what does this do?