/*
 2011-02 YUTAKA SAITOH
*/

function getCookie(item) {
    var i, index, arr;
    arr = document.cookie.split(";");
    for(i = 0; i < arr.length; i++) {
        index = arr[i].indexOf("=");
        if(arr[i].substring(0, index) == item || 
                arr[i].substring(0, index) == " " + item)
            return arr[i].substring(index + 1);
    }
    return "";
}

var cookie="";	


$(document).ready(function(){
	cookie=getCookie('isopen');	
	if(cookie=='none'){
		$('#tree').css('display','none');
		$('#treenode').attr('class','treeclosed');
		document.cookie = 'isopen=none;path=/' ;
	}else{
		$('#tree').css('display','block');
		$('#treenode').attr('class','treeopen');
		document.cookie ='isopen=block;path=/';
	}
	
	$('#treenode').click(function(event){

		var disp=$('#tree').css('display');
		if( disp=='block' ){
			$('#tree').css('display','none');
		}else{
			$('#tree').css('display','block');
		}

		var classn= $('#treenode').attr('class');

		if(classn=='treeopen'){
			$('#treenode').attr('class','treeclosed');
		}else{
			$('#treenode').attr('class','treeopen');
		}
		document.cookie = 'isopen='+$('#tree').css('display')+';path=/' ;
		return false;

	});
});