xmenu.js

一个非常好的jsp+wml的例子（包括代码） 源码,对初接触wap编程的爱好者 ...

/********************************
*
*          xmenu v1.3
*          CopyRight: stinger 2005/9
*
*********************************/

function getObject(id)
{
	if (typeof(id)!="string" || id=="") return(null);
	if (document.all) return(document.all(id));
	if (document.getElementById) return(document.getElementById(id));
	try
	{
		return(eval(id));
	}
	catch(E)
	{
		return(null);
	}
}

function _xmenu(OName)
{
	this.name = OName;
	this.Queue = new Array();
	this.SeqId = 0;
	this.CImage = "/images/xmenu0.gif";
	this.OImage = "/images/xmenu1.gif";
	this.CFolder = "/images/folder0.gif";
	this.OFolder = "/images/folder1.gif";
	this.IName = "image";
	this.Dest = OName;
}

//SeqId, Follow, Name, URL, Target, Extend
_xmenu.prototype.Add = function()
{
	this.Queue[this.SeqId++] = arguments;
}

_xmenu.prototype.Update = function()
{
	for (var i=0; i<this.SeqId; i++)
	{
		if (this.Queue[i][0]==arguments[0])
		{
			this.Queue[i] = arguments;
			break;
		}
	}
}

_xmenu.prototype.Remove = function(Seq)
{
	var Queue = new Array();
	var k = 0;
	for (var i=0; i<this.SeqId; i++)
	{
		if (this.Queue[i][0]!=Seq) Queue[k++] = this.Queue[i];
	}
	this.Queue = Queue;
	this.SeqId = Queue.length;
}

_xmenu.prototype.hasChild = function(Seq)
{
	for (var i=0; i<this.SeqId; i++)
	{
		if (this.Queue[i][1]==Seq) return(true);
	}
	return(false);
}

_xmenu.prototype.Query = function(Seq)
{
	for (var i=0; i<this.SeqId; i++)
	{
		if (this.Queue[i].length==6 && this.Queue[i][5]==Seq) return(this.Queue[i]);
	}
	return(null);
}

_xmenu.prototype.toHTML = function(Seq, Depth)
{
	var html = "";
	for (var i=0; i<this.SeqId; i++)
	{
		if (this.Queue[i][1]==Seq)
		{
			var MyId = this.name + this.Queue[i][0];
			html += '<div id="' + MyId + '" style="';
			//style
			html += 'position:relative;left:' + (Depth*10) + 'px;'
			if (Seq) html += 'display:none;';
			//html += 'cursor:hand"';
			html += '"';
			//onclick
			//html += ' onclick="' + this.name + '.expand(\'' + MyId + '\');"';
			html += '>'
			//images
			html += '<img id="' + this.IName + this.Queue[i][0] + '" src="'
			if (this.hasChild(this.Queue[i][0]))
			{
				html += this.CImage;
			}
			else
			{
				html += this.OImage;
			}
			html += '" border="0" style="cursor:hand"';
			html += ' onclick="' + this.name + '.expand(\'' + MyId + '\');" />';
			//innerText
			html += '&nbsp;'
			if (this.Queue[i][3]==null)
			{
				html += '<a href="#"';
			}
			else
			{
				html += '<a href="' + this.Queue[i][3] + '"';
				html += ' target="' + (this.Queue[i][4]==null?this.Dest:this.Queue[i][4]) + '"';
			}
			html += ' style="cursor:hand"';
			html += ' onclick="' + this.name + '.expand(\'' + MyId + '\');">';
			html += this.Queue[i][2];
			html += '</a>';
			html += this.toHTML(this.Queue[i][0], Depth+1);
			html += '</div>';
		}
	}
	return(html);
}

_xmenu.prototype.expand = function(id)
{
	var Obj = getObject(id);
	var Seq = Obj.id.substring(this.name.length);
	var fd = false;
	var fi = false;
	Seq = parseInt(Seq);
	if (this.hasChild(Seq))
	{
		for (var i=0; i<this.SeqId; i++)
		{
			if (this.Queue[i][1]==Seq)
			{
				var MyId = this.name + this.Queue[i][0];
				var MyObj = getObject(MyId);
				if (MyObj!=null)
				{
					if (fd==false)
					{
						fd = true;
						fi = (MyObj.style.display=='none')?true:false;
					}
					MyObj.style.display = fi?'block':'none';
				}
				//if (fi==false && this.hasChild(this.Queue[i][0])) this.expand(MyId);
			}
		}
		getObject(this.IName + Seq).src = (fi==true)?this.OImage:this.CImage;
	}
}

_xmenu.prototype.expandx = function(Seq)
{
	var MyId;
	var MyObj;
	for (var i=0; i<this.SeqId; i++)
	{
		if (this.Queue[i][0]==Seq)
		{
			if (this.hasChild(Seq))
			{
				for (k=0; k<this.SeqId; k++)
				{
					if (this.Queue[k][1]==Seq)
					{
						MyId = this.name + this.Queue[k][0];
						MyObj = getObject(MyId);
						if (MyObj!=null) MyObj.style.display = 'block';
					}
				}
			}
			MyId = this.IName + this.Queue[i][0];
			MyObj = getObject(MyId);
			if (MyObj) MyObj.src = this.OImage;
			if (this.Queue[i][1]!=0) this.expandx(this.Queue[i][1]);
			break;
		}
	}
}