function si_contact_captcha_refresh(form_num,type,securimage_url,securimage_show_url) {
var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
var string_length = 16;
var prefix = '';
for (var i=0; i<string_length; i++) {
var rnum = Math.floor(Math.random() * chars.length);
prefix += chars.substring(rnum,rnum+1);
}
document.getElementById('si_code_ctf_' + form_num).value = prefix;
var si_image_ctf = securimage_show_url + prefix;
document.getElementById('si_image_ctf' + form_num).src = si_image_ctf;
if(type == 'flash') {
var si_flash_ctf_url = securimage_url+'/securimage_play.swf?prefix='+prefix+'&bgColor1=#8E9CB6&bgColor2=#fff&iconColor=#000&roundedCorner=5&audio='+securimage_url+'/securimage_play.php?prefix='+prefix;
var si_flash_ctf = '<object type="application/x-shockwave-flash" data="'+si_flash_ctf_url+'" id="SecurImage_as3_'+form_num+'" width="19" height="19">';
si_flash_ctf += '<param name="allowScriptAccess" value="sameDomain" />';
si_flash_ctf += '<param name="allowFullScreen" value="false" />';
si_flash_ctf += '<param name="movie" value="'+si_flash_ctf_url+'" />';
si_flash_ctf += '<param name="quality" value="high" />';
si_flash_ctf += '<param name="bgcolor" value="#ffffff" />';
si_flash_ctf += '</object>';
document.getElementById('si_flash_ctf' + form_num).innerHTML = si_flash_ctf;
return false;
}
if(type == 'wav') {
var si_aud_ctf = securimage_url+'/securimage_play.php?prefix='+prefix;
document.getElementById('si_aud_ctf' + form_num).href = si_aud_ctf;
}
}