function trim(str, chars) {
    return ltrim(rtrim(str, chars), chars);
}

function ltrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}

function rtrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}
function makeXmlHttp()
{
        var xmlhttp;

        /** Special IE only code ... */
        /*@cc_on
          @if (@_jscript_version >= 5)
              try
              {
                  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
              }
              catch (e)
              {
                  try
                  {
                      xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                  }
                  catch (E)
                  {
                      xmlhttp = false;
                  }
             }
          @else
             xmlhttp = false;
        @end @*/

        /** Every other browser on the planet */
        if (!xmlhttp && typeof XMLHttpRequest != 'undefined')
        {
            try
            {
                xmlhttp = new XMLHttpRequest();
            }
            catch (e)
            {
                xmlhttp = false;
            }
        }
        return xmlhttp;
}

function verzenden()
{

		var t = '';
        var index = 0;
        var rtlen = 0;
        var search = document.getElementById('search').value;
        var domain = document.getElementById('domain').value;
 		var terms = document.getElementById('terms').value; 
 		var lang = document.getElementById('lang').value; 
       xmlHttp = makeXmlHttp();
        
        xmlHttp.onreadystatechange = function()
        {
                // alert("xmlHttp.readyState: "+xmlHttp.readyState); // deze doet het niet :(
                if ( xmlHttp.readyState == 3 )
                        rtlen = xmlHttp.responseText.length;
						t = trim(xmlHttp.responseText);
						
                        if (index < rtlen) {
							if(t.length<10) {
							document.getElementById("seoresult").innerHTML += xmlHttp.responseText.substring(index);
							}
							
							if(t.length>9) {
 							}
                            index = rtlen;
                }
                if ( xmlHttp.readyState == 4 )
                {
                        // alert("xmlHttp.status: "+xmlHttp.status);
                        if ( xmlHttp.status == 200 )
                        {
                                if ( xmlHttp.responseText == 'False' )
                                {
                                        document.getElementById("seoresult").innerHTML = '&nbsp;&nbsp;<font color="#009900">Beschikbaar</font>';
                                }
                                else if ( xmlHttp.responseText == 'Nothing' )
                                {
                                        document.getElementById("seoresult").innerHTML = '&nbsp;&nbsp;';
                                }
                                else
                                {
										document.getElementById("loader").innerHTML = '';
                                        document.getElementById("seoresult").innerHTML = xmlHttp.responseText;
                                }
                        }
                }
        }
		document.getElementById("loader").innerHTML = '<img src="ajax-loader.gif" />';
        xmlHttp.open("POST", "serp.php?search=" + search + "&domain=" + domain + "&terms=" + terms + "&lang=" + lang, true);
        xmlHttp.send('');
}