slideMenu.Registry = [];

function slideMenu(id,numLines) {
	slideMenu.Registry[id] = [];
	slideMenu.Registry[id]['height']       = 1;
	slideMenu.Registry[id]['containerObj'] = document.getElementById(id+"Container");
	slideMenu.Registry[id]['contentObj']   = document.getElementById(id+"Content");
	slideMenu.Registry[id]['maxHeight']    = new Number(numLines * (slideMenu.lineHeight)+1);
	//slideMenu.Registry[id]['maxHeight']    = (slideMenu.Registry[id]['containerObj'].scrollHeight * numLines) - (numLines - 1);
	slideMenu.Registry[id]['interval']     = null;
	slideMenu.Registry[id]['timeout']      = null;
	
	//slideMenu.Registry[id]['contentObj'].style.height  = '1px';
	
	// slide down events
	if(slideMenu.Registry[id]['containerObj'] != null){
		slideMenu.Registry[id]['containerObj'].onmouseover = function() { slideMenu.showMenu(id); }
		slideMenu.Registry[id]['containerObj'].onfocus     = function() { slideMenu.showMenu(id); }
		
		// slide up events
		slideMenu.Registry[id]['containerObj'].onmouseout  = function() { slideMenu.hideMenu(id); }
		slideMenu.Registry[id]['containerObj'].onblur      = function() { slideMenu.hideMenu(id); }
	}
}

slideMenu.showMenu = function(id) {
	clearInterval(slideMenu.Registry[id]['interval']);
		
	slideMenu.Registry[id]['contentObj'].style.display = 'block';
	//slideMenu.Registry[id]['contentObj'].style.paddingTop = '5px';
	slideMenu.Registry[id]['contentObj'].style.zIndex += 10;
	
	slideMenu.Registry[id]['interval'] = window.setInterval("slideMenu.slideDown('"+id+"')",1);
}

slideMenu.hideMenu = function(id) {
	clearInterval(slideMenu.Registry[id]['interval']);
	
	slideMenu.Registry[id]['contentObj'].style.zIndex = 10;
	slideMenu.Registry[id]['interval'] = window.setInterval("slideMenu.slideUp('"+id+"')",1);
}

slideMenu.slideDown = function(id) {
	for(var i=0;i<7;i++) {
		if(slideMenu.Registry[id]['height'] >= slideMenu.Registry[id]['maxHeight']) {
			clearInterval(slideMenu.Registry[id]['interval']);
		} else {
			slideMenu.Registry[id]['contentObj'].style.height = slideMenu.Registry[id]['height']+'px';
			slideMenu.Registry[id]['height'] ++;
		}
	}
}

slideMenu.slideUp = function(id) {
	for(var i=0;i<7;i++) {
		if(slideMenu.Registry[id]['height'] <= 1) {
			clearInterval(slideMenu.Registry[id]['interval']);
			slideMenu.Registry[id]['contentObj'].style.display = 'none';
		} else {
			slideMenu.Registry[id]['contentObj'].style.height = slideMenu.Registry[id]['height']+'px';
			slideMenu.Registry[id]['height'] --;
		}
	}
}

//<![CDATA[
function addLoadEvent(func) {
	var oldonload = window.onload;
	if(typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() { 
			oldonload();
			func();
		}
	}
}