求各位大神指点一二，Jquery用的不是很熟练，帮我看看那里错了！或者是否还有其他的做法？

ITSword 2015-07-09 11:37:31

<ul class="menu_block">

    <li class="tabguide btn_list btnOn" data-link="authority/courses/sectionGuideBook.html" 

data-key="f55ce876-fa0d-4027-9569-22ed531100a7" data-finished="true" data-disabled="false"></li>

    <li class="btn-disable tabvideo" data-link="authority/courses/sectionvideo.html"

data-key="" data-finished="false" data-disabled="true"></li>

    <li class="btn-disable tabmachine" data-link="authority/courses/sectionmachine.html" 

data-key="" data-finished="false" data-disabled="true"></li>

    <li class="tabhomework btn_list" data-link="authority/courses/sectionhomework.html" 

data-key="7512c739-0d33-438a-93e8-97a77329d032" data-finished="false" data-disabled="false"></li>

 

</ul>

function isStudyOver(){

	var num=0;

	var fin=0;

	//var sec = $('.left_block>ul>li');

	var sec = $('.menu_block');

	sec.find("li[data-key !='']").each(function(){

		if($(this).attr("data-key")!=""){

			num++;

			if($(this).attr("data-finished")){

				fin++;

			}

		}

	});

//	sec.each(function(){

//		if($(this).attr("data-key")!=""){

//			num++;

//			if($(this).attr("data-finished")){

//				fin++;

//			}

//		}

//	});

	if(num==fin){

		alert("asfasdf");

	}

}

求：使用Jquery获取data-key ！=null 的标签，然后对获取到的新标签逐一判断data-finished的值？如何不为空的li数与data-finished=“true”的数，相同，那么alert（“asdas”）；

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枫醉秋 2015-07-09

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引用楼主 ITSword 的回复:

<ul class="menu_block">
    <li class="tabguide btn_list btnOn" data-link="authority/courses/sectionGuideBook.html" 
data-key="f55ce876-fa0d-4027-9569-22ed531100a7" data-finished="true" data-disabled="false"></li>
    <li class="btn-disable tabvideo" data-link="authority/courses/sectionvideo.html"
data-key="" data-finished="false" data-disabled="true"></li>
    <li class="btn-disable tabmachine" data-link="authority/courses/sectionmachine.html" 
data-key="" data-finished="false" data-disabled="true"></li>
    <li class="tabhomework btn_list" data-link="authority/courses/sectionhomework.html" 
data-key="7512c739-0d33-438a-93e8-97a77329d032" data-finished="false" data-disabled="false"></li>
 
</ul>

function isStudyOver(){
	var num=0;
	var fin=0;
	//var sec = $('.left_block>ul>li');
	var sec = $('.menu_block');
	sec.find("li[data-key !='']").each(function(){
		if($(this).attr("data-key")!=""){
			num++;
			if($(this).attr("data-finished")){
				fin++;
			}
		}
	});
//	sec.each(function(){
//		if($(this).attr("data-key")!=""){
//			num++;
//			if($(this).attr("data-finished")){
//				fin++;
//			}
//		}
//	});
	if(num==fin){
		alert("asfasdf");
	}
}