// 利用Cookie取得Client基本資料
setCookie('IS_TOUCH_DEVICE', ('ontouchstart' in window?'T':'F'), 7, '/');   //Is touch device
setCookie(['SCREEN_SIZE','WIDTH'], screen.width, 7, '/');                   //Client's Screen width
setCookie(['SCREEN_SIZE','HEIGHT'], screen.height, 7, '/');                 //Client's Screen height

function getCookie( name ) {
	if (typeof name == 'object') {
    	if (name[0].trim() == "" || name[1].trim() == "") { return null; }
		var start = document.cookie.indexOf( name[0] + "=" );
        if ((start == -1) || (!start) && (name[0] != document.cookie.substring(0,name[0].length))) { return null; }
		var len = start + name[0].length + 1;
        var end = document.cookie.indexOf( ";", len );
        if ( end == -1 ) end = document.cookie.length;
        var arr = document.cookie.substring(len,end).split("&");
        for (var i = 0; i < arr.length; i++) {
           	var arr2 = arr[i].split("=");
        	if (arr2[0] == escape(name[1])) { return (arr2[1].trim()==''?null:unescape(arr2[1])); }
        }
        return null;
    } else {
    	if (name.trim() == '') { return null; }
		var start = document.cookie.indexOf( name + "=" );
        if ((start == -1) || (!start) && (name != document.cookie.substring(0,name.length))) { return null; }
		var len = start + name.length + 1;
        var end = document.cookie.indexOf( ";", len );
        if ( end == -1 ) end = document.cookie.length;
        return unescape( document.cookie.substring( len, end ) );
    }
}

var COOKIE_EXPIRES = 1;
function setCookie( name, value, expires, path, domain, secure) {
	// 計算過期日
	var today = new Date();
	today.setTime(today.getTime());
	if ( expires ) { expires = expires * 1000 * 60 * 60 * 24; }
    else { expires = COOKIE_EXPIRES * 1000 * 60 * 60 * 24; }
	var expires_date = new Date(today.getTime() + (expires));
    
    if (typeof name == 'object') { // cookie with multiple value
    	if (name[0].trim() == "" || name[1].trim() == "") { return false; }
    	var s = '';
		var start = document.cookie.indexOf(name[0] + "=");
        if ((start == -1) || (!start) && (name[0] != document.cookie.substring(0,name[0].length ))) { //cookie name[0]不存在
        	s = escape(name[1]) + "=" + escape(value);
        } else { //cookie name[0]存在
			var len = start + name[0].length + 1;
    	    var end = document.cookie.indexOf( ";", len );
        	if ( end == -1 ) end = document.cookie.length;
	        var s = document.cookie.substring( len, end );
        	if (s.indexOf(escape(name[1])+"=") == -1) { //name[1]不存在
            	s = s + (s==""?"":"&") + escape(name[1]) + "=" + escape(value);
            } else { //name[1]存在,需修改
            	var arr = s.split("&")
                s = ""
                for (var i = 0; i < arr.length; i++) {
                	if (arr[i].indexOf(escape(name[1])+"=") == 0) {
                    	if (value) { s = s + (s==""?"":"&") + escape(name[1]) + "=" + escape(value); }
                    } else { s = s + (s==""?"":"&") + arr[i];}
                }
            }
        }
		document.cookie = name[0] + "=" + s +
			( ( expires ) ? ";expires="+expires_date.toUTCString() : '' ) + 
			( ( path ) ? ';path=' + (path||'/') :'') +
			( ( domain ) ? ';domain=' + (domain||location.hostname) : '') +
			( ( secure ) ? ';secure' : '' );
    } else { // cookie with single value
    	if (name.trim() == '') { return false; }
		document.cookie = name + "=" + escape(value) +
			( ( expires ) ? ";expires="+expires_date.toUTCString() : '' ) + 
			( ( path ) ? ';path=' + (path||'/') :'') +
			( ( domain ) ? ';domain=' + (domain||location.hostname) : '') +
			( ( secure ) ? ';secure' : '' );
    }
    return true;
}
	
function deleteCookie( name, path, domain ) {
    if ( getCookie( name ) ) document.cookie = name + "=" +
            ( ( path ) ? ";path=" + path : ";path=" + '/') +
            ( ( domain ) ? ";domain=" + domain : "") +
            ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}