function NavButtonRoll(obj){
	if(!obj.style.top || obj.style.top=="0px"){
		obj.style.top = "-24px";
	}else{
		obj.style.top = "0px";
	}
}

function ImgSwap(img_id,img_src){
	var img = document.getElementById(img_id);
	img.src = img_src;
}

function MakeActive(obj){
	var parent = obj.parentNode.parentNode;
	//alert(parent);
	var children = parent.getElementsByTagName('A');
	for($i=0; $i<children.length;$i++){
		var child = children[$i];
		child.className = '';
		child.childNodes[0].className = '';
	}
	obj.className = 'active';
	obj.childNodes[0].className = 'active';
}
function MakeActiveSect(obj){
	var parent = obj.parentNode.parentNode.parentNode.parentNode;
	//alert(parent);
	var children = parent.getElementsByTagName('A');
	for($i=0; $i<children.length;$i++){
		var child = children[$i];
		child.className = '';
	}
	obj.className = 'active';
}

function ShowOnly(objparent,objtag,objid){
	var parent = document.getElementById(objparent);
	//alert(parent);
	var children = parent.getElementsByTagName('*');
	for($i=0; $i<children.length;$i++){
		var child = children[$i];
		if(child.tagName==objtag && child.id==objid){
			if(child.style.display=='' || child.style.display=='none'){
				child.style.display = 'block';
			}
		}else if(child.tagName==objtag){
			child.style.display = 'none';
		}
	}
}

function ShowWorkSection(section_id){
	ShowOnly('worksection_td','P',section_id+'_text');
	ShowOnly('workthumb_td','UL',section_id+'_thumblist');
	var thumbs = document.getElementById('workthumb_td').getElementsByTagName('img')
	for($i=0; $i<thumbs.length;$i++){thumbs[$i].className = '';}
	ShowOnly('workimg_td','DIV',section_id+'_captionlist');
	switch(section_id) {
		case 'ranges':img_src='img/94.1MHz.jpg';break;
		case 'mhz':img_src='img/400.15MHz.jpg';break;
		case 'telemetry':img_src='img/Telemetry1.jpg';break;
	}
	ImgSwap('workimg',img_src);
}

function createXMLHttpRequest() {
  if(window.XMLHttpRequest) {
    try { 
      HttpObj = new XMLHttpRequest();
    } catch(e) { return null; }
  } else if(window.ActiveXObject) {
    try {
      HttpObj = new ActiveXObject("Msxml2.XMLHTTP");
    } catch(e) {
      try {
        HttpObj = new ActiveXObject("Microsoft.XMLHTTP");
      } catch (e) { return null; }
    }
  } else return null;
return HttpObj;
}

function Edit(button){
	var parent = button.parentNode;
	var origtxt = parent.innerHTML;
	parent.innerHTML = '<textarea cols="22" rows="20">'+origtxt+'</textarea>\
	<input value="save" type="button" class="editbutton" href="javascript:void(0);" onclick="Save(this);" />';
	
}
	
function Save(button){
	var parent = button.parentNode;
	var newtxt = button.previousSibling.previousSibling.value;
	var url = "php/savedits.php?target="+parent.id+"&newtxt="+newtxt;
	//var url = "php/savedits.php";
	//var params = ("newtxt="+newtxt);
	var AjaxObj = new createXMLHttpRequest();
	AjaxObj.open("GET", url, true);
	//AjaxObj.open("POST", url, true);
	AjaxObj.onreadystatechange = function(){
		if(AjaxObj.readyState == 4 && AjaxObj.status == 200) {
			parent.innerHTML = AjaxObj.responseText;
			//alert(AjaxObj.responseText);
		}
	}
	AjaxObj.send(null);
	//AjaxObj.send(params);
}

function Log(x) {
var l = (window.innerWidth/2)-150;
window.open('php/login.php?log='+x, 'Title', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=300,height=100,left='+l+',top=300');
}