function get(id) { return document.getElementById(id); }
function getInnerHTML(id) { return document.getElementById(id).innerHTML; }
function setInnerHTML(id, d) { var e = get(id); if (e != null) { e.innerHTML = d; } }
function getClassName(id) { return document.getElementById(id).className; }
function setClassName(id, c) {  var e = get(id);if (e != null) { e.className = c; } }
function getStyleAttr(id,p) { var e = get(id);if(e != null) { return e.style[p]; } }
function setStyleAttr(id,p,v) { var e = get(id);if(e != null) { e.style[p] = v; } }
function changeCLS(id,cls) { setClassName(id,cls); }

function show(id) { var e = get(id);if (e != null) { if(arguments.length>1) { setStyleAttr(id,"display",arguments[1]); } else { setStyleAttr(id,'display','block'); } } }
function hide(id) { var e = get(id); if (e != null) { if(arguments.length>1) { setStyleAttr(id,"display",arguments[1]); } else { setStyleAttr(id,'display','none'); } } }
function showDiv(id) { show(id); }
function hideDiv(id) { hide(id); }
function showInline(id) { show(id,"inline"); }
function hideInline(id) { hide(id,"hidden"); }
function displayInline(id) { show(id,"inline"); }
function hideInline(id) { hide(id,"hidden"); }
function toggle(id)
{
	if(get(id)!=null)
	{
		switch(getStyleAttr(id,"display"))
		{
			case "block":
				hide(id);
				break;
			case "inline":
				hideInline(id);
				break;
			case "none":
				show(id);
				break;
			case "hidden":
				displayInline(id);
				break;
			default:
				show(id);
				hide(id);
				break;
		}
	}
}
function strCompare(a,b) { if(a.toLowerCase()==b.toLowerCase()) { return true; }  else { return false;  } }
function exists(o) { if((o!=null)&&(o!="null")&&(o!=undefined)) { return true; } else { return false; } }

function addEvent(elm, evType, fn, useCapture)
{
	if(elm.addEventListener){ elm.addEventListener(evType, fn, useCapture); return true; }
	else if(elm.attachEvent){ var r = elm.attachEvent('on' + evType, fn); return r; }
	else { elm['on' + evType] = fn; }
}