自动弹出div菜单

(function($){
/**
menus:菜单数据,json数据格式,每个menu json必须包含有两个个key,1、url,表示点击菜单是需要跳转的位置;2、name,显示的菜单名称;3、cssClass,当前菜单的样式
settings:对框的显示设置,width:宽;height:高;top:顶部距离;left:左边距离;cssClass:整个框的样式;cols:显示几列
*/
$.fn.showMenu = function(menus,settings){
	var tableId = '_show_Menu_id_';
	var cols = settings && settings.cols ? settings.cols : 2;
	var _left = settings && settings.left ? settings.left : 0;
	var _top = settings && settings.top ? settings.top : 0;
	var _width = settings && settings.width ? settings.width : 0;
	var _height = settings && settings.height ? settings.height : 0;
	
	var lt = function(){
		var p = this;
		var left  = $(this).offset().left;
		var top = $(this).offset().top;		
		while(p.get(0).tagName != 'HTML' && p.get(0).tagName != 'html' ){
			p = p.parent();
			left  += $(p).offset().left;
		    top += $(p).offset().top;	
		}
		return {left:left,top:top};
	}
	var offset = lt.apply(this);
	offset.left = offset.left + this.width()-8 + _left;
	offset.top   = offset.top-this.height()+5+_top;
	var tdCss = {'border-top':'1px solid #ffffff','border-right':'1px solid #ffffff','background-color':'#E8E8E8',cursor:'hand'};
	var d = function(){
		var $mdiv = $('<div></div>');
		$mdiv.attr('id',tableId);
		$mdiv.css({border:'1px solid #B0C4DE',position:'absolute',display:'none','z-index':9999,left:offset.left,top:offset.top});
		if(_width > 0){
			$mdiv.width(_width);
		}
		if(_height > 0){
			$mdiv.heigth(_height);
		}
		
		var $table = $('<table cellspacing=0 cellpading=0 ></table>');
		$table.css({'background-color':'#E8E8E8',border:'0px'});
		var index = 0;
		var $tr ;
		$(menus).each(function(){			
			if(index % cols == 0){
				$tr = $('<tr></tr>');
				$table.append($tr);
			}
			var $td = $('<td nowrap url='+this.url+'>'+this.name+'</td>');
			$td.css(tdCss);
			if(this.cssClass){
				$td.addClass(this.cssClass);
			}
			$tr.append($td);
			index++;
		});
		 
		if(menus.length % cols != 0){
			for(var i = cols -( menus.length % cols); i > 0 ; i--){
				var $td = $('<td nowrap> </td>');
				$td.css(tdCss);
				$tr.append($td);
			}
		}
		var tdbg;
		$table.find('td').each(function(){
			var url = $(this).attr('url');
			if(url && url != ''){
				$(this).click(function(){
					$table.find('td').css('background-color','#E8E8E8');
					$(this).css('background-color','#DB9D9B');
					hidebox();
					top.document.location = url;
				});
			}
			$(this).mouseover(function(){
				tdbg = $(this).css('background-color');
				$(this).css('background-color','#A2ECAD');
			}).mouseout(function(){
				$(this).css('background-color',tdbg);
			});
		});

		$mdiv.append($table);
		$(this).append($mdiv);
	}
	d.apply(this);
	$(this).mouseover(function(){
		//alert($('#'+tableId).is(':hidden'))
		//alert($('#'+tableId).is(':visible'))
		if(!$('#'+tableId).is(':visible')){
			$('#'+tableId).show(500);
		}
	});
	$(this).mouseout(function(ev){
		if(ev.clientX < offset.left){
			hidebox();
		}
		
	});
	
	var hidebox = function(){
		$('#'+tableId).hide(500);
	}
	$(document).bind('click',function(){hidebox();});

}
})(jQuery)


 主要功能是弹出和隐藏当前对话框,类似于丁丁地图或者点评网的切换城市一样的功能

cols为1的显示效果:

自动弹出div菜单_第1张图片

cols为2的显示效果:

cols为3的显示效果:

大家可以根据自己的实际情况进行改变。

 

例子:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> 菜单显示 </TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js" type="text/javascript"></script>
 </HEAD>

 <BODY>
  <center>
<div id="dia" style="width:120px;height:22px;border:1px solid #3d3d3d;cursor:handle">
菜单显示
</div>
  </center>
 </BODY>
<script>
(function($){
/**
menus:菜单数据,json数据格式,每个menu json必须包含有两个个key,1、url,表示点击菜单是需要跳转的位置;2、name,显示的菜单名称;3、cssClass,当前菜单的样式
settings:对框的显示设置,width:宽;height:高;top:顶部距离;left:左边距离;cssClass:整个框的样式;cols:显示几列
*/
$.fn.showMenu = function(menus,settings){
	var tableId = '_show_Menu_id_';
	var cols = settings && settings.cols ? settings.cols : 2;
	var _left = settings && settings.left ? settings.left : 0;
	var _top = settings && settings.top ? settings.top : 0;
	var _width = settings && settings.width ? settings.width : 0;
	var _height = settings && settings.height ? settings.height : 0;
	
	var lt = function(){
		var p = this;
		var left  = $(this).offset().left;
		var top = $(this).offset().top;		
		while(p.get(0).tagName != 'HTML' && p.get(0).tagName != 'html' ){
			p = p.parent();
			left  += $(p).offset().left;
		    top += $(p).offset().top;	
		}
		return {left:left,top:top};
	}
	var offset = lt.apply(this);
	offset.left = offset.left + this.width()-8 + _left;
	offset.top   = offset.top-this.height()+5+_top;
	var tdCss = {'border-top':'1px solid #ffffff','border-right':'1px solid #ffffff','background-color':'#E8E8E8',cursor:'hand'};
	var d = function(){
		var $mdiv = $('<div></div>');
		$mdiv.attr('id',tableId);
		$mdiv.css({border:'1px solid #B0C4DE',position:'absolute',display:'none','z-index':9999,left:offset.left,top:offset.top});
		if(_width > 0){
			$mdiv.width(_width);
		}
		if(_height > 0){
			$mdiv.heigth(_height);
		}
		
		var $table = $('<table cellspacing=0 cellpading=0 ></table>');
		$table.css({'background-color':'#E8E8E8',border:'0px'});
		var index = 0;
		var $tr ;
		$(menus).each(function(){			
			if(index % cols == 0){
				$tr = $('<tr></tr>');
				$table.append($tr);
			}
			var $td = $('<td nowrap url='+this.url+'>'+this.name+'</td>');
			$td.css(tdCss);
			if(this.cssClass){
				$td.addClass(this.cssClass);
			}
			$tr.append($td);
			index++;
		});
		 
		if(menus.length % cols != 0){
			for(var i = cols -( menus.length % cols); i > 0 ; i--){
				var $td = $('<td nowrap> </td>');
				$td.css(tdCss);
				$tr.append($td);
			}
		}
		var tdbg;
		$table.find('td').each(function(){
			var url = $(this).attr('url');
			if(url && url != ''){
				$(this).click(function(){
					$table.find('td').css('background-color','#E8E8E8');
					$(this).css('background-color','#DB9D9B');
					hidebox();
					top.document.location = url;
				});
			}
			$(this).mouseover(function(){
				tdbg = $(this).css('background-color');
				$(this).css('background-color','#A2ECAD');
			}).mouseout(function(){
				$(this).css('background-color',tdbg);
			});
		});

		$mdiv.append($table);
		$(this).append($mdiv);
	}
	d.apply(this);
	$(this).mouseover(function(){
		//alert($('#'+tableId).is(':hidden'))
		//alert($('#'+tableId).is(':visible'))
		if(!$('#'+tableId).is(':visible')){
			$('#'+tableId).show(500);
		}
	});
	$(this).mouseout(function(ev){
		if(ev.clientX < offset.left){
			hidebox();
		}
		
	});
	
	var hidebox = function(){
		$('#'+tableId).hide(500);
	}
	$(document).bind('click',function(){hidebox();});

}
})(jQuery)
var menus = eval('[{"url":"http://www.baidu.com","name":"百度"},{"url":"http://www.126.com","name":"网易邮箱"},{"url":"http://www.google.com.hk","name":"Google"},{"url":"http://www.126.com","name":"网易邮箱"}]');
$("#dia").showMenu(menus,{cols:3});
</script>

</HTML>


 

 

 

 

 

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