function valid(f){
if(f['firstname'].value==''||f['firstname'].value==f['firstname'].defaultValue){
alert(f['firstname'].defaultValue+' is required');
f['firstname'].focus();
return false
}
if(f['lastname'].value==''||f['lastname'].value==f['lastname'].defaultValue){
alert(f['lastname'].defaultValue+' is required');
f['lastname'].focus();
return false
}
if(f['company'].value==''||f['company'].value==f['company'].defaultValue){
alert(f['company'].defaultValue+' is required');
f['company'].focus();
return false
}
if(f['websiteaddress'].value==''||f['websiteaddress'].value==f['websiteaddress'].defaultValue){
alert(f['websiteaddress'].defaultValue+' is required');
f['websiteaddress'].focus();
return false
}
if(f['email'].value==''||f['email'].value==f['email'].defaultValue){
alert(f['email'].defaultValue+' is required');
f['email'].focus();
return false;
}




 s = f['email'].value;
 var i = 1;
 var sLength = s.length;
while ((i < sLength) && (s.charAt(i) != "@"))
        { i++
        }

        if ((i >= sLength) || (s.charAt(i) != "@")) { alert('Please Enter Your E-mail address (e.g. myname@website.com)'); return false; }
        else { i += 2; }

        // look for .
        while ((i < sLength) && (s.charAt(i) != "."))
        { i++
        }

        // there must be at least one character after the .
        if ((i >= sLength - 1) || (s.charAt(i) != ".")) {  alert('Please Enter Your E-mail address (e.g. myname@website.com)');  return false; }
		
		
		

if(f['phone'].value==''||f['phone'].value==f['phone'].defaultValue){
alert(f['phone'].defaultValue+' is required');
f['phone'].focus();
return false
}
  var j;
	d = f['phone'].value;
      for (j = 0; j < d.length; j++)
      {
         var c = d.charAt(j);
         if (isNaN(c)) 
	   {
		alert("Given value is not a number");
		return false;
	   }	
      }
     

if(f['howdofoundus'].value==''||f['howdofoundus'].value==f['howdofoundus'].defaultValue){
alert(f['howdofoundus'].defaultValue+' is required');
f['howdofoundus'].focus();
return false
}
if(f['howdofoundus'].value==''||f['howdofoundus'].value==f['howdofoundus'].defaultValue){
alert(f['howdofoundus'].defaultValue+' is required');
f['howdofoundus'].focus();
return false
}
if(f['security_code'].value==''||f['security_code'].value==f['security_code'].defaultValue){
alert('Please Enter Security code');
f['security_code'].focus();
return false
}			
}