jquery动态菜单
1.代码:
//Accordion Content script: By Dynamic Drive, at http://www.dynamicdrive.com
//Created: Jan 7th, 08'
var ddaccordion={
contentclassname:{}, //object to store corresponding contentclass name based on headerclass
expandone:function(headerclass, selected){ //PUBLIC function to expand a particular header
this.toggleone(headerclass, selected, "expand")
},
collapseone:function(headerclass, selected){ //PUBLIC function to collapse a particular header
this.toggleone(headerclass, selected, "collapse")
},
expandall:function(headerclass){ //PUBLIC function to expand all headers based on their shared CSS classname
var $headers=$('.'+headerclass)
$('.'+this.contentclassname[headerclass]+':hidden').each(function(){
$headers.eq(parseInt($(this).attr('contentindex'))).click()
})
},
collapseall:function(headerclass){ //PUBLIC function to collapse all headers based on their shared CSS classname
var $headers=$('.'+headerclass)
$('.'+this.contentclassname[headerclass]+':visible').each(function(){
$headers.eq(parseInt($(this).attr('contentindex'))).click()
})
},
toggleone:function(headerclass, selected, optstate){ //PUBLIC function to expand/ collapse a particular header
var $targetHeader=$('.'+headerclass).eq(selected)
var $subcontent=$('.'+this.contentclassname[headerclass]).eq(selected)
if (typeof optstate=="undefined" || optstate=="expand" && $subcontent.is(":hidden") || optstate=="collapse" && $subcontent.is(":visible"))
$targetHeader.click()
},
expandit:function($targetHeader, $targetContent, config){
$targetContent.slideDown(config.animatespeed)
this.transformHeader($targetHeader, config, "expand")
},
collapseit:function($targetHeader, $targetContent, config){
$targetContent.slideUp(config.animatespeed)
this.transformHeader($targetHeader, config, "collapse")
},
transformHeader:function($targetHeader, config, state){
$targetHeader.addClass((state=="expand")? config.cssclass.expand : config.cssclass.collapse) //alternate btw "expand" and "collapse" CSS classes
.removeClass((state=="expand")? config.cssclass.collapse : config.cssclass.expand)
if (config.htmlsetting.location=='src'){ //Change header image (assuming header is an image)?
$targetHeader=($targetHeader.is("img"))? $targetHeader : $targetHeader.find('img').eq(0) //Set target to either header itself, or first image within header
$targetHeader.attr('src', (state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse) //change header image
}
else if (config.htmlsetting.location=="prefix") //if change "prefix" HTML, locate dynamically added ".accordprefix" span tag and change it
$targetHeader.find('.accordprefix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
else if (config.htmlsetting.location=="suffix")
$targetHeader.find('.accordsuffix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
},
getCookie:function(Name){
var re=new RegExp(Name+"=[^;]+", "i") //construct RE to search for target name/value pair
if (document.cookie.match(re)) //if cookie found
return document.cookie.match(re)[0].split("=")[1] //return its value
return null
},
setCookie:function(name, value){
document.cookie = name + "=" + value+";path=/";
},
init:function(config){
//alert(ddaccordion.getCookie(config.headerclass));
//让项的内容不可见!
document.write('<style type="text/css">\n')
document.write('.'+config.contentclass+'{display: none}\n') //generate CSS to hide contents
document.write('<\/style>')
$(document).ready(function(){
ddaccordion.contentclassname[config.headerclass]=config.contentclass //remember contentclass name based on headerclass
//设置样式collapse:表示展开之前的样式，expand:表示展开之后的样式；
config.cssclass={collapse: config.toggleclass[0], expand: config.toggleclass[1]} //store expand and contract CSS classes as object properties
//在展开前后显示的内容，location:表示显示在什么位置，collapse:表示在展开之前显示的内容，expand:表示在展开之后显示的内容；
config.htmlsetting={location: config.togglehtml[0], collapse: config.togglehtml[1], expand: config.togglehtml[2]} //store HTML settings as object properties
var lastexpanded={} //object to hold reference to last expanded header and content (jquery objects)获得最后展开的栏目
var expandedindices=(config.persiststate)? ddaccordion.getCookie(config.headerclass) : config.defaultexpanded//获得所有展开的栏目
expandedindices=(typeof expandedindices=='string')? expandedindices.replace(/c/ig, '').split(',') : config.defaultexpanded //test for valid cookie ('string'), otherwise (null, or 1st page load), default to defaultexpanded setting
var $subcontents=$('.'+config["contentclass"])//获得展开的内容信息
if (config["collapseprev"] && expandedindices.length>1)
expandedindices=[expandedindices.pop()] //return last array element as an array (for sake of jQuery.inArray())
//循环的对头进行操作
$('.'+config["headerclass"]).each(function(index){ //loop through all headers
if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && $(this).html()!=""){ //add a SPAN element to header depending on user setting and if header is a container tag
$('<span class="accordprefix"></span>').prependTo(this)
$('<span class="accordsuffix"></span>').appendTo(this)
}
//给头加上一个属性headerindex，值等于index+'h'
$(this).attr('headerindex', index+'h') //store position of this header relative to its peers
//给栏目加上一个属性contentindex,值等于index+'c'
$subcontents.eq(index).attr('contentindex', index+'c') //store position of this content relative to its peers
//获得具体的某个栏目项
var $subcontent=$subcontents.eq(index)
//判断是否显示具体的栏目
if (jQuery.inArray(index, expandedindices)!=-1){ //check for headers that should be expanded automatically
if (config.animatedefault==false)
$subcontent.show()
ddaccordion.expandit($(this), $subcontent, config)
lastexpanded={$header:$(this), $content:$subcontent}
} //end check
else{
$subcontent.hide()
ddaccordion.transformHeader($(this), config, "collapse")
}
})
$('.'+config["headerclass"]).click(function(){ //assign behavior when headers are clicked on
var $subcontent=$subcontents.eq(parseInt($(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed
if ($subcontent.css('display')=="none"){
ddaccordion.expandit($(this), $subcontent, config)
if (config["collapseprev"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?
ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config)
}
lastexpanded={$header:$(this), $content:$subcontent}
}
else{
ddaccordion.collapseit($(this), $subcontent, config)
}
return false
})
$(window).bind('unload', function(){ //clean up and persist on page unload
$('.'+config["headerclass"]).unbind('click')
var expandedindices=[]
$('.'+config["contentclass"]+":visible").each(function(index){ //get indices of expanded headers
expandedindices.push($(this).attr('contentindex'))
})
if (config.persiststate==true){ //persist state?
expandedindices=(expandedindices.length==0)? '-1c' : expandedindices //No contents expanded, indicate that with dummy '-1c' value?
ddaccordion.setCookie(config.headerclass, expandedindices)
}
})
})
}
}
2.使用:
<script src="http://www.cnblogs.com/JS/command.js" type="text/javascript"></script>
<script src="http://www.cnblogs.com/JS/Menu.js" type="text/javascript"></script>
<script type="text/javascript">
ddaccordion.init({
headerclass: "expandable", //Shared CSS class name of headers group that are expandable//头的样式名称
contentclass: "categoryitems", //Shared CSS class name of contents group//展开项的样式名称
collapseprev: false, //Collapse previous content (so only one open at any time)? true/false 表示是否只允许同时展开一个！
defaultexpanded: [0], //index of content(s) open by default [index1, index2, etc]. [] denotes no content//默认展开的项
animatedefault: false, //Should contents open by default be animated into view?//默认项展开时是否有动态效果
persiststate: true, //persist state of opened contents within browser session?//是否保存展开的栏目
toggleclass: ["", "openheader"], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]//展开前后头的样式
togglehtml: ["prefix", "", ""], //Additional HTML added to the header when it's collapsed and expanded, respectively ["position", "html1", "html2"] (see docs)//展开前后要显示的html
animatespeed: "normal" //speed of animation: "fast", "normal", or "slow"//展开效果选择
})
</script>
