// JavaScript Document
var xmlHttp;
var has_secondary;
var use_loader;
var load_element;

function populate(str,script,element,display,numchars,data,flag,multiple,useloader,loaderelement){
    temp = element; //declare global
    has_secondary = multiple;
    use_loader = useloader;
    load_element = loaderelement;
    
    if(display != "nohide")
    {
        //check for ALL
        if(str=="" || str==0){
            document.getElementById(temp + "wrap").style.display = "none";
        } else {
            if(numchars > 0 && numchars != "")
            {
                if(str.length >= numchars)
                    document.getElementById(temp + "wrap").style.display = "";
                else
                    document.getElementById(temp + "wrap").style.display = "none";
            }
            else
            {
                document.getElementById(temp + "wrap").style.display = "";
            }
        }
    }

    //no header request functionality
    xmlHttp=GetXmlHttpObject()
    if (xmlHttp==null){
        alert ("Sorry, your browser does not support HTTP Request. Exiting function.");
        return;
    }

    var url="/js/include/" + script + ".php"; //use dynamic file
    url=url+"?q="+str; //val pass
    url=url+"&d="+data; // additional data
    url=url+"&f="+flag; // additional params
    url=url+"&sid="+Math.random(); //id for ajax
    xmlHttp.onreadystatechange=stateChanged;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);
}

function stateChanged(multiple){
    if (xmlHttp.readyState == 1 && use_loader == 1) {
        document.getElementById(load_element).style.display = "block";
    }
    if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") {
        if (use_loader == 1) {
            document.getElementById(load_element).style.display = "none";
        }
        document.getElementById(temp).innerHTML=xmlHttp.responseText; //dynamic write
        if(has_secondary == 1) {
            secondary_ajax();
        }
    }
}

function GetXmlHttpObject(){
    var objXMLHttp=null
    
    if (window.XMLHttpRequest)
        objXMLHttp=new XMLHttpRequest()
    else if (window.ActiveXObject)
        objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
    return objXMLHttp
}


function ajaxrequestObj(what_to_search_for, target_area_id, name_of_ajax_file, is_it_initially_invisible){
	//validate parameters
	if(what_to_search_for == "" || target_area_id == "" || name_of_ajax_file == "") {
		alert("Invalid request made.\nPlease check parameters are being sent correctly.");
		return false;
	}
	else {
		var ajaxObject = new Object();
		ajaxObject.searchdata = what_to_search_for;
		ajaxObject.targetarea = target_area_id;
		ajaxObject.filename = name_of_ajax_file;
		ajaxObject.invisible = is_it_initially_invisible;
		ajaxObject.loader = target_area_id + "_loader";
	}

	//check for support
	try {
		document.getElementById;
	}
	catch(dom) {
		alert("Your browser does not support a required method.\nPlease use an updated browser.");
		return false;
	}
	try {
		var xmlhttp = new XMLHttpRequest();
	}
	catch(firefox) {
		try {
			var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch(explorer) {
			alert("Your browser does not support Ajax.\nPlease use an updated version of Firefox, Internet Explorer, Safari or Opera.");
		}
	}
	
	//request status
	xmlhttp.onreadystatechange = function() {

		//request complete
		if(xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			//check if target area exists
			switch(typeof(ajaxObject.targetarea)){
				case "string":
					try {
						var targetareaobj = document.getElementById(ajaxObject.targetarea);
					}
					catch(targetarea) {
						alert("Target area does not exist!\nCancelling request...");
						return false;
					}
					
					//check loader exists
					if(document.getElementById(ajaxObject.loader)) {
						var loaderobj =	document.getElementById(ajaxObject.loader);
						loaderobj.style.display = "none";
					}
					
					//if initially invisible, then show
					if(ajaxObject.invisible == true) {
						targetareaobj.style.display = "block";
					}
					
					//write the output
					targetareaobj.innerHTML = xmlhttp.responseText;
					break;
				case "function":
					ajaxObject.targetarea(xmlhttp.responseText);
					break;
			}
		}
		//loading...
		else if(xmlhttp.readyState == 1) {
			//check loader exists
			if(document.getElementById(ajaxObject.loader)) {
				var loaderobj =	document.getElementById(ajaxObject.loader);
				loaderobj.style.display = "block";
			}
		}
	}
	
	//prep url
	var url = "http://"+document.domain+ "/js/include/base.php?p=" + ajaxObject.searchdata + "&f=" + ajaxObject.filename;

	//send request
	xmlhttp.open("GET", url, true);
    xmlhttp.send(null);

}




function htmlescape(string){
    return string.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
}



function ajaxrequest(what_to_search_for, target_area_id, name_of_ajax_file, is_it_initially_invisible) {
	new ajaxrequestObj(what_to_search_for, target_area_id, name_of_ajax_file, is_it_initially_invisible);

}