var xmlHttp
var divname 
//divname ='txtHint';

function post(url,frm,div)/*This function allows the user to specify a div name to return submited form information*/
{	
	sendVal		= null;
	
	get_post	="GET";
	divname		= div;
	xmlHttp=GetXmlHttpObject();

	if (xmlHttp==null){alert ("Browser does not support HTTP Request");return;}
	if(frm!=""){sendVal = getFormElementsString(frm);get_post="POST";}//If a form object is passed the post elements

	xmlHttp.onreadystatechange=sendData;/*stateChanged*/
	xmlHttp.open(get_post,url,true);
	xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
	 //xmlHttp.setRequestHeader("Content-Type", "text/javascript");
	xmlHttp.send(sendVal);
}



function getFormElementsString(frm)
{
	var sendVal='';
	var numEl=0;
	var el='';
	var f= document.forms[frm];
	numEl = f.elements.length;
	
	for(i=0;i<numEl;i++)
	{
		el = f.elements[i];
		if(el.type=='checkbox')
		{
			if(el.checked==true)
				//sendVal=sendVal+el.name+'='+ urlencode(el.value)+ '&';
				sendVal=sendVal+el.name+'='+ el.value+ '&';
		}
		else
		{
				//sendVal=sendVal+el.name+'='+ urlencode(el.value)+ '&';
				sendVal=sendVal+el.name+'='+ el.value+ '&';
		}

	}
	
	//remove the last &
	sendVal = sendVal.substr(0,(sendVal.length-1));

	return sendVal;
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
	document.getElementById(divname).innerHTML=xmlHttp.responseText 
 } 
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}

function sendData()
{	
    var dC = document.getElementById(divname);
    if(xmlHttp.readyState == 4)
    {
        dC.innerHTML = xmlHttp.responseText;
    }
    else if(xmlHttp.readyState == 1)
    {
       dC.innerHTML = "<table align='center' height='100%' width='100%' border='0'><tr valign='center' align='center'><td ><br><br><br><img src='images/ajaxloader.gif' alt='' /></td></tr></table>"
    }
}
function urlencode( str ) {
    // http://kevin.vanzonneveld.net
    // +   original by: Philip Peterson
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +      input by: AJ
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // %          note: info on what encoding functions to use from: http://xkr.us/articles/javascript/encode-compare/
    // *     example 1: urlencode('Kevin van Zonneveld!');
    // *     returns 1: 'Kevin+van+Zonneveld%21'
    // *     example 2: urlencode('http://kevin.vanzonneveld.net/');
    // *     returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
    // *     example 3: urlencode('http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a');
    // *     returns 3: 'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a'
                                     
    var histogram = {}, histogram_r = {}, code = 0, tmp_arr = [];
    var ret = str.toString();
    
    var replacer = function(search, replace, str) {
        var tmp_arr = [];
        tmp_arr = str.split(search);
        return tmp_arr.join(replace);
    };
    
    // The histogram is identical to the one in urldecode.
    histogram['!']   = '%21';
    histogram['%20'] = '+';
    
    // Begin with encodeURIComponent, which most resembles PHP's encoding functions
    ret = encodeURIComponent(ret);
    
    for (search in histogram) {
        replace = histogram[search];
        ret = replacer(search, replace, ret) // Custom replace. No regexing
    }
    
    // Uppercase for full PHP compatibility
    return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
        return "%"+m2.toUpperCase();
    });
    
    return ret;
}