// JavaScript Document

// マウスオーバー
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

// レフトメニュースクロール
$(function () {
	if($('#Leftmenu').size() > 0){
		var headerHeight = $('#Leftmenu').position().top;
		var mainContent = $('#LeftArea').next();
		$('#mainContent2').height(mainContent.height());
		var mainMarginLeft = mainContent.css('margin-left') === 'auto' ? 0 : mainContent.css('margin-left');
		mainContent.css('top', parseInt(mainContent.offset().top))
				   .css('left',(parseInt(mainContent.offset().left) - parseInt(mainMarginLeft)))
				   .css('width', mainContent.width())
				   .css('position', 'absolute');
		$('#Leftmenu').css('top', 0);
		
		$(window).scroll(function (event) {
			var scrollTop = $(this).scrollTop();
			
			if (scrollTop > headerHeight) {
				
				if(isIE6() === true){
					$('#Leftmenu').css('top', scrollTop - headerHeight);
				}
				else{
					$('#Leftmenu').css('position', 'fixed');
				}
				
			} else {
				$('#Leftmenu').css('position', 'relative');
				$('#Leftmenu').css('top', 0);
			}
		});
		
		 $(window).bind('resize', function(){
			 var offsetLeft = $('#LeftArea').offset().left　+ $('#LeftArea').width();
			 mainContent.css('left', offsetLeft);
		 });
	};
	
	function isIE6(){
		if(!$.support.opacity
		&& !$.support.style
		&& typeof document.documentElement.style.maxHeight == "undefined"
		){
			return true;
		}
		return false;
	}
});