// toggle
function toggle(x1,x2) {
	var toggler = document.getElementById(x1);
	var togglee = document.getElementById(x2);
	if (togglee.style.display=='block') {
		togglee.style.display='none';
		toggler.style.backgroundPosition='left top';
	} else {
		togglee.style.display='block';
		toggler.style.backgroundPosition='-108px top';
	}
}

// toggle discussion panels
function toggleDiscussion(x1,x2) {
	var toggler = document.getElementById(x1);
	var togglee = document.getElementById(x2);
	var togglerAll = document.getElementById('toggler-all');
	if (togglee.style.display=='block') {
		togglee.style.display='none';
		toggler.style.background='rgb(255, 255, 255) url(images/bg_expand.gif) no-repeat scroll 100% 0%';
		togglerAll.style.background='rgb(255, 255, 255) url(images/bg_expand_all.gif) no-repeat scroll 0% 0%';
	} else {
		togglee.style.display='block';
		toggler.style.background='rgb(255, 255, 255) url(images/bg_collapse.gif) no-repeat scroll 100% 0%';
		togglerAll.style.background='rgb(255, 255, 255) url(images/bg_collapse_all.gif) no-repeat scroll 0% 0%';
	}
}

function setToggler() {
	var toggler = document.getElementById('toggler-all');
	var panels = getElementsByClassName(document.getElementById("right"), "div", "disc-hide");	
	toggler.style.background='rgb(255, 255, 255) url(images/bg_collapse_all.gif) no-repeat scroll 0% 0%';
	
	for(i=0;i<panels.length;i++) {
		panels[i].style.display = 'block';
	}
	
}

function toggleAll() {
	var toggler = document.getElementById('toggler-all');
	var panels = getElementsByClassName(document.getElementById("right"), "div", "disc-hide");	
	var togglers = getElementsByClassName(document.getElementById("right"), "a", "togglers");
	//alert(toggler.style.background);
	
	
	if(toggler.style.background.indexOf("bg_collapse_all")!=-1) {
		toggler.style.background='#fff url(images/bg_expand_all.gif) no-repeat';
		for(i=0; i<panels.length; i++) {
			panels[i].style.display='none';
			togglers[i].style.background='rgb(255, 255, 255) url(images/bg_expand.gif) no-repeat scroll 100% 0%';
		}
	} else {
		toggler.style.background='rgb(255, 255, 255) url(images/bg_collapse_all.gif) no-repeat scroll 0% 0%';
		for(i=0; i<panels.length; i++) {
			panels[i].style.display='block';
			togglers[i].style.background='rgb(255, 255, 255) url(images/bg_collapse.gif) no-repeat scroll 100% 0%';
		}
	}
}


// get elements by classname
function getElementsByClassName(oElm, strTagName, strClassName){
	var arrElements = (strTagName == "*" && oElm.all)? oElm.all : oElm.getElementsByTagName(strTagName);
	var arrReturnElements = new Array();
	strClassName = strClassName.replace(/-/g, "\-");
	var oRegExp = new RegExp("(^|\s)" + strClassName + "(\s|$)");
	var oElement;
	for(var i=0; i<arrElements.length; i++){
		oElement = arrElements[i];
		if(oRegExp.test(oElement.className)){
			arrReturnElements.push(oElement);
		}
	}
	return (arrReturnElements)
}