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var params = {user:$('user_name').value,password:$('password').value};
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var login_ajax = new Ajax.Request(url, {
method:'post',asynchronous:false,
parameters:params,
onSuccess:function(transport) {
        if(!transport.responseXML) {
DbgPrint(transport.responseText);
return;
}
if(check_response_error(transport.responseXML))
{
window.location.replace('main.html');
}


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