var availability_check_checked=false;var g_em_msg_id;function omchat_availability_check(value,table,field,em_msg_id)
{if(value.length==0)return;g_em_msg_id=em_msg_id;var progress=getElement(g_em_msg_id);progress.innerHTML='Checking...';progress.style.display='inline';xmlhttp_request('/CMS/php/xml_availability_check.php','value='+encodeURIComponent(value)+'&table='+table+'&field='+field,'GET',omchat_availability_check_processxml,xmlhttp_error,true,true);}
function omchat_availability_check_processxml(xml)
{var items=xml.documentElement.getElementsByTagName('item');var error=getNodeValue(items.item(0),'error');var msg=getNodeValue(items.item(0),'msg');if(error==0)availability_check_checked=true;else availability_check_checked=false;getElement(g_em_msg_id).innerHTML=msg;}