function LoadLayers(){
	document.getElementById("display_title").innerHTML="<img src='../images/titles/layers.gif'>"
	//LoadPage('layers.php');
	document.getElementById('display_content').innerHTML = "";
	tree=new dhtmlXTreeObject(document.getElementById('display_content'),"100%","100%",0);
	tree.setImagePath("../images/cat_icon/");
	tree.enableCheckBoxes(false);
	tree.enableDragAndDrop(false);
//	tree.enableHighlighting(true);
	//tree.attachEvent("onClick",onNodeSelect(id));
	tree.setOnClickHandler(function(id){chgLayers(id);});
	tree.loadXML("../main/layers_xml.php");
	//tree.loadXML("tree.xml");
}

//function ReloadMap(zone, sector)
function ReloadMap()
{
	zone=document.getElementById("szone").value;
	sector=document.getElementById("ssec").value;
	xmin=parseFloat(document.getElementById("x_min").value);
	xmax=parseFloat(document.getElementById("x_max").value);
	ymin=parseFloat(document.getElementById("y_min").value);
	ymax=parseFloat(document.getElementById("y_max").value);
	myMap.setFullExtent(xmin,xmax,ymin,ymax);
	myMap.removeOverlayPoints();
	var leyer="tehran";

	if (zone<10) {
		leyer="z0"+zone+" zs0"+zone+" "+leyer;
	}
	if (zone>9) {
		leyer="z"+zone+" zs"+zone+" "+leyer;
	}

	if (sector<10){
		leyer="s00"+sector+" "+leyer;
	
	}
	if (sector>0 & sector<100){
		leyer="s0"+sector+" "+leyer;
	
	}
	if (sector>99){
		leyer="s"+sector+" "+leyer;
	
	}
	myMap.setLayers(leyer);
//	myMap.setLayers("s$sector z$zone tehran");
//	alert(11);
	myMap.redraw(); 
}
function show_layer(layerId){
	myMap.removeOverlayPoints();
	if (layerId==1)	
		myMap.setLayers('DRAINAGE zone tehran');
	else if (layerId==11)	
		myMap.setLayers('DRAINAGE tehran');
	else if (layerId==2)	
		myMap.setLayers('gosaltr zone tehran');
	else if (layerId==22)	
		myMap.setLayers('gosaltr tehran');
	else if (layerId==3)	
		myMap.setLayers('mergeflood zone tehran');
	else if (layerId==33)	
		myMap.setLayers('mergeflood tehran');
	else if (layerId==4)	
		myMap.setLayers('RIVER zone tehran');
	else if (layerId==44)	
		myMap.setLayers('RIVER tehran');
	myMap.redraw();
}
function show_point(p_id,x,y){
	document.getElementById("tbl_info").style.visibility="hidden";
	document.getElementById("sub_info").style.visibility="hidden";
	//document.getElementById("p_cat").style.visibility="hidden";
	xmin=x-400;
	xmax=x+400;
	ymin=y-200;
	ymax=y+200;
	myMap.setLayers('marzmahalat tehran');
	myMap.setFullExtent(xmin,xmax,ymin,ymax);
	myMap.redraw();
	myMap.removeOverlayPoints();
	a = '../images/mm_20_red.png'; 
	myIcon= new msIcon(a, 1); 
	mySkin = null;
//	alert(tree.getUserData(itemId, "layer_id"));
	p=p_id+"&ty=1";
	myMap.loadPointsOverlayWFS('show_record_info.php',p,myIcon, mySkin,1);

}
function show_help(){
	window.open("help.php");
 
}