controllo select

[jet]

      <form name="form" action="" method="post" onsubmit="return checkForm(this);">
<script type="text/JavaScript">
<!--
function checkForm(f){
var Background = f.background;
var Family = f.family;
var Size = f.size;
var Color = f.color;

if(Background == "choose background color"){
alert("Choose background color");
f.background.focus();
return false;
}
if(Family == "choose font family"){
alert("Choose font family");
f.family.focus();
return false;
}
if(Size == "choose font size"){
alert("Choose font size");
f.size.focus();
return false;
}
if(Color == "choose font color"){
alert("Choose font color");
f.color.focus();
return false;
}
}
// -->
</script>


      



      


      CHOOSE YOUR STYLE
      


      <select size="1" name="background" class="main_form_campo">
                    <option selected value="choose background color">choose background color
                    </option>
                    <option value="white">white</option>
                    <option value="black">black</option>
                    </select>
 background color
      


      <select size="1" name="family" class="main_form_campo">
                    <option selected value="choose font family">choose font family
                    </option>
                    <option value="arial">arial</option>
                    <option value="verdana">verdana</option>
                    </select> 
font family
      


      <select size="1" name="size" class="main_form_campo">
                    <option selected value="choose font size">choose font size
                    </option>
                    <option value="1">1</option>
                    <option value="2">2</option>
                    </select> 
font size 
      


      <select size="1" name="color" class="main_form_campo">
                    <option selected value="choose font color">choose font color
                    </option>
                    <option value="white">white</option>
                    <option value="black">black</option>
                    </select>
font color  
     



      <input type="submit" name="submit" class="save" onClick="form.action='add_ord_ch.asp'" value="">
      </form>

Dove sbaglio, visto che non controlla nulla!

[jet]

var Background = f.background.value;
var Family = f.family.value;
var Size = f.size.value;
var Color = f.color.value;

...