function doOver(evt) {
	try
	{
		if (evt == null){
			evt = window.event;
		}
		var owner = evt.target;
		if (owner == null)
			owner = evt.srcElement;
		
		var control = owner;
		
		if(owner.className.indexOf("ddToolbarButtonImage")>-1)
			control = owner.parentNode;
		
		if(control.className == "ddToolbarButtonDisabled")
			return;
			
	    control.className = "ddToolbarButtonHover";
	}
	catch(e)
	{
		DiagContext.traceError('doOver error',e);
	}
}

function doOut(evt) {
	
	try
	{
		if (evt == null){
			evt = window.event;
		}
		var owner = evt.target;
		if (owner == null)
			owner = evt.srcElement;
		
		var control = owner;
		
		if(owner.className.indexOf("ddToolbarButtonImage")>-1)
			control = owner.parentNode;
		
		if(control.className == "ddToolbarButtonDisabled")
			return;

		if (control.isSunken)
		    control.className = "ddToolbarButtonPressed";	
		else
		    control.className = "ddToolbarButton";		
	}
	catch(e)
	{
		DiagContext.traceError('doOut error',e);
	}

}

function doDown(evt) {
	try
	{
		if (evt == null){
			evt = window.event;
		}
		var owner = evt.target;
		if (owner == null)
			owner = evt.srcElement;
		
		var control = owner;
		
		if(owner.className.indexOf("ddToolbarButtonImage")>-1)
			control = owner.parentNode;
		
		if(control.className == "ddToolbarButtonDisabled")
			return;
		control.className = "ddToolbarButtonPressed";
		
	}
	catch(e)
	{
		DiagContext.traceError('doDown error',e);
	}
}

function doUp(evt) {
	try
	{
		if (evt == null){
			evt = window.event;
		}
		var owner = evt.target;
		if (owner == null)
			owner = evt.srcElement;
		
		var control = owner;
		
		if(owner.className.indexOf("ddToolbarButtonImage")>-1)
			control = owner.parentNode;
		
		if(control.className == "ddToolbarButtonDisabled")
			return;
		
		if (control.isSunken)
		    control.className = "ddToolbarButtonPressed";	
		else
		    control.className = "ddToolbarButtonHover";		
		
	}
	catch(e)
	{
		DiagContext.traceError('doUp error',e);
	}
}


function disable(el) {
	//readyState is IE only
	if (document.readyState != null && document.readyState != "complete") {
		window.setTimeout("disable(" + el.id + ")", 100);	// If document not finished rendered try later.
		return;
	}
	if(el == null)
		return;

	el.className = "";
	el.className = "ddToolbarButtonDisabled";

	if(el.onmouseover!=null){
		el.cachedOnMouseOver = el.onmouseover;
		el.onmouseover = null;
	}

	if(el.onclick!=null){
		el.cachedOnClick = el.onclick;
		el.onclick = null;
	}
}

function enable(el) {
	
	if(el == null)
		return;		
		
	el.className = "";
	el.className = "ddToolbarButton";
	
	if(el.cachedOnMouseOver!=null){
		el.onmouseover = el.cachedOnMouseOver;
		el.cachedOnMouseOver = null;
	}
	if(el.cachedOnClick!=null){
		el.onclick = el.cachedOnClick;
		el.cachedOnClick = null;
	}
}

function sink(el) {
	
	if (el == null)
		return;		
	
	if (el.className == "ddToolbarButtonDisabled")
	    return;
		
	el.isSunken = true;
	el.className = "";
	el.className = "ddToolbarButtonPressed";
}

function unsink(el) {
	
	if (el == null)
		return;		

	if (el.className == "ddToolbarButtonDisabled")
	    return;

	el.isSunken = false;
	el.className = "";
	el.className = "ddToolbarButton";
}