// STYLING FILE INPUTS 1.0 | Shaun Inman <http://www.shauninman.com/> | 2007-09-07
if (!window.SI) { var SI = {}; };
SI.Files =
{
	htmlClass : 'SI-FILES-STYLIZED',
	fileClass : 'filefield',
	wrapClass : 'cabinet',
	
	fini : false,
	able : false,
	init : function()
	{
		this.fini = true;
		
		var ie = 0 //@cc_on + @_jscript_version
		if (window.opera || (ie && ie < 5.5) || !document.getElementsByTagName) { return; } // no support for opacity or the DOM
		//----------------------------IE6だとファイルをキャンセルした時、挙動がおかしいみたい。
		if (ie && ie < 6.5) {
			//return;
		}
		//----------------------------
		this.able = true;
		
		var html = document.getElementsByTagName('html')[0];
		html.className += (html.className != '' ? ' ' : '') + this.htmlClass;
	},
	
	stylize : function(elem)
	{
		if (!this.fini) { this.init(); };
		if (!this.able) { return; };
		
		elem.parentNode.file = elem;
		elem.parentNode.onmousemove = function(e)
		{
			if (typeof e == 'undefined') e = window.event;
			if (typeof e.pageY == 'undefined' &&  typeof e.clientX == 'number' && document.documentElement)
			{
				e.pageX = e.clientX + document.documentElement.scrollLeft;
				e.pageY = e.clientY + document.documentElement.scrollTop;
			};
			
			var cox = coy = 0;
			var pelem = this.parentNode;
			if (pelem.offsetParent)
			{
				cox = pelem.offsetLeft;
				coy = pelem.offsetTop;
				while (pelem = pelem.offsetParent)
				{
					cox += pelem.offsetLeft;
					coy += pelem.offsetTop;
				};
			};
			
			var ox = oy = 0;
			var elem = this;
			if (elem.offsetParent)
			{
				ox = elem.offsetLeft;
				oy = elem.offsetTop;
				while (elem = elem.offsetParent)
				{
					ox += elem.offsetLeft;
					oy += elem.offsetTop;
				};
			};
			
			var x = e.pageX - ox;
			var y = e.pageY - oy;
			var w = this.file.offsetWidth;
			var h = this.file.offsetHeight;
			
			var cw = this.parentNode.offsetWidth;
			var ch = this.parentNode.offsetHeight;
			
			if(e.pageX < cox || e.pageX > cox + cw || e.pageY < coy || e.pageY > coy + ch)
			{
				//IE
				this.file.style.top		= 0 +'px';
				this.file.style.left	= 0 +'px';
				return;
			}
			
			this.file.style.top		= y - (h / 2)  + 'px';
			this.file.style.left	= x - (w - 30) + 'px';
		};
		elem.parentNode.onmouseout = function(e)
		{
			//FF
			this.file.style.top		= 0 +'px';
			this.file.style.left	= 0 +'px';
		}
	},
	
	stylizeById : function(id)
	{
		this.stylize(document.getElementById(id));
	},
	
	stylizeAll : function()
	{
		if (!this.fini) { this.init(); };
		if (!this.able) { return; };
		
		var inputs = document.getElementsByTagName('input');
		for (var i = 0; i < inputs.length; i++)
		{
			var input = inputs[i];
			if (input.type == 'file' && input.className.indexOf(this.fileClass) != -1 && input.parentNode.className.indexOf(this.wrapClass) != -1)
			{
				this.stylize(input);
			};
		};
	}
};