(function($){
  
	 
	function addHeader(target,title){ 
		  
		var header = $('<div class="fwmessager-header"><div class="fwmessager-title">'+title+' (crtl+x)</div></div>').prependTo(target);
   
		var tool = $('<div class="fwmessager-tool"></div>').appendTo(header); 
			$('<div class="fwmessager-tool-close" keycomb="ctrl+x"></div>').appendTo(tool).bind('click', 
					function(){	
				           target.hide();
				           target.mask.hide();
				           target.mask.remove();
				           target.remove();
				    }); 
 
		tool.find('div').hover(
			function(){$(this).addClass('fwmessager-tool-over');},
			function(){$(this).removeClass('fwmessager-tool-over');}
		);
	}
	
	function setSize(target){
	 
		target.css({
	 	    display:'block',
	 	    top:document.body.scrollTop + document.body.clientHeight/2-100,
	 	    left:document.body.clientWidth/2 - 100, 
			width:'300',
			height:'100'
		  });
 
		  
	}
	
 
 function setProperties(win){
	  
     var  opts = $.extend({},{zIndex:90000,width:300,height:100,left:0,top:0,draggable:false}); 
     var  state = $.data(win,'fwmessager', {options:opts});
     
     
     
     var body   = win.find('.fwmessager-body');
     var header = win.find('.fwmessager-header');
     var button = win.find('.fwmessager-button');
     
     //处理由于一行字符串过长的问题
    if(body.outerWidth()>header.outerWidth()+20){
    	header.width(body.outerWidth()); 
    	button.width(body.outerWidth());
    }
     
     
 	win.draggable({
			handle: '>div.fwmessager-header>div.fwmessager-title',
			disabled: false,
			onStartDrag: function(e){
 		     win.css('z-index', state.options.zIndex++);
 		
				if (state.mask) state.mask.css('z-index', state.options.zIndex++); 
				if (!state.proxy){
					state.proxy = $('<div class="fwmessager-proxy"></div>').insertAfter(win);
				}
				state.proxy.css({
					display:'none',
					zIndex: state.options.zIndex++,
					left: e.data.left,
					top: e.data.top,
					width: ($.boxModel==true ? (win.outerWidth()-(win.outerWidth()-win.width())) : win.outerWidth()),
					height: ($.boxModel==true ? (win.outerHeight()-(win.outerHeight()-win.height())) : win.outerHeight())
				});
				setTimeout(function(){
					if (state.proxy) state.proxy.show();
				}, 500);
			},
			onDrag: function(e){
				state.proxy.css({
					display:'block',
					left: e.data.left,
					top: e.data.top
				});
				return false;
			},
			onStopDrag: function(e){
				state.options.left = e.data.left;
				state.options.top = e.data.top; 
				win.css({left:e.data.left,top:e.data.top});
				state.proxy.remove();
				state.proxy = null;
			}
		});
		
 
 }
	
	/**
	 * create a dialog, when dialog is closed destroy it
	 */
	function createDialog(title, content){
		var win = $('<div class="fwmessager"></div>').appendTo('body');
        var body =  $('<div class="fwmessager-body"></div>').appendTo(win);
        
        var cont =  $('<div class="fwmessager-content"></div>').appendTo(body); 
        var pdiv = $('<div class="pdiv"></div>');
        var reg = /\n/g;
        content = content.replace(reg,'<br>')
        pdiv.html(content); 
		addHeader(win,title);  
		cont.append(pdiv);  
		 $('<div class="fwmessager-button" ></div>').appendTo(win);
		return win;
	}
	
   function setButtonClose(win){
		var button = win.find("div.fwmessager-button");
		
	    $('<a herf="javascript:void(0)" class="buttonlink">关闭</a>').appendTo(button).bind('click', 
			function(){	
	    	     win.hide();
	    	     win.mask.hide();
	    	     win.mask.remove();
	    	     win.remove();
		    }); 
			return false;    
   }
   
   function setButtonOK(win,fn){
	   var button = win.find("div.fwmessager-button");
	    $('<a herf="javascript:void(0)" class="buttonlink">确定</a>').appendTo(button).bind('click', 
			function(){	 
	    	   
	    	     win.hide();
	    	     win.mask.hide();
	    	     win.mask.remove();
	    	     fn =  window[fn];
	    	    if (fn){
	    	    	fn(true);  
	    	 	}
	    	  	
		    }); 
			return false;    
  }
	 
	
   function setButtonCL(win,fn){
	   var button = win.find("div.fwmessager-button");
	    $('<a herf="javascript:void(0)" class="buttonlink">取消</a>').appendTo(button).bind('click', 
			function(){	 
	    	win.hide();
	    	win.mask.hide();
	    	win.mask.remove();
	    	win.remove();
	    	fn =  window[fn];
	    	 if(fn){
	    	    fn(false);
	    	 }
	    	 
		    }); 
			return false;    
  }
	
   function setModal(win){
		if (win.mask) win.mask.remove();
	 
			win.mask = $('<div class="fwmessager-mask"></div>').appendTo('body');
			win.mask.css({
				width: getPageArea().width,
				height: getPageArea().height 
			});
 
	
	   return true;
   }
   
	
	function getPageArea() {
		if (document.compatMode == 'BackCompat') {
			return {
				width: Math.max(document.body.scrollWidth, document.body.clientWidth),
				height: Math.max(document.body.scrollHeight, document.body.clientHeight)
			}
		} else {
			return {
				width: Math.max(document.documentElement.scrollWidth, document.documentElement.clientWidth),
				height: Math.max(document.documentElement.scrollHeight, document.documentElement.clientHeight)
			}
		}
	}
	
	jQuery.fwmessager = { 
		show: function(msg) { 
			var win = createDialog('提示信息',msg+'');
			setSize(win);
			setButtonClose(win);
			setModal(win);
			setProperties(win);  
		    jQuery('.buttonlink',win).each(function(){
				   $(this).linkbutton({plain:false}); 
			     });
					
		}, 
		confirm: function(msg,fn) { 
			var win = createDialog('提示信息',msg+'');
			setSize(win);
			setButtonOK(win,fn);
			setButtonCL(win,fn);
			setModal(win);
			setProperties(win); 
		    jQuery('.buttonlink',win).each(function(){
				   $(this).linkbutton({plain:false}); 
			     });
					
		}
	};
 
	
})(jQuery);