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1、基于Javascript实现二级联动菜单效果_本文实例为大家分享了Javascript实现二级联动菜单效果的对应代码，具体内容如下具体实现步骤如下：1.所用js代码如下：scripttype="text/javascript"vararr_province=["请选择省份/城市","北京市","上海市","天津市","河南省","山东省","河北省"];vararr_city=[["请选择城市/地区"],["中关村","海淀区","朝阳区","昌平区","丰台区","大兴区"],["宝坻区","浦东新区","长宁区","徐汇区","虹口区","宝山区"],["和平区","河东区
2、","河西区","塘沽区","大港区","北辰区"],["郑州市","洛阳市","商丘市","开封市","安阳市","濮阳市"],["济南市","青岛市","烟台市","德州市"],["石家庄","菏泽市","唐山市"],];functioninit(){varprovince=document.form1.province;province.style.width=150+"px";varcity=document.form1.city;city.style.width=150+"px";//给province赋值高度，才能在其里面写入内容province.length=ar
3、r_province.length;for(vari=0;iarr_province.length;i++){province.options[i].text=arr_province[i];province.options[i].value=arr_province[i];}//设置默认被选中的选项varindex=0;province.selectedIndex=index;//给city赋值高度，才能在其里面写入内容city.length=arr_city[index].length;for(varj=0;jarr_city[index].length;j++){city
4、.options[j].text=arr_city[index][j];city.options[j].value=arr_city[index][j];}}functionselect_change(num){varcity=document.form1.city;city.length=0;city.length=arr_city[num].length;for(vari=0;iarr_city[num].length;i++){city.options[i].text=arr_city[num][i];city.options[i].value=arr_city[num]
5、[i];}}/script2.body中的代码如下：bodyonload="init()"formname="form1"所在地区：selectname="province"onchange="select_change(this.selectedIndex)"/select城市：selectname="city"/select/form/body其次个效果：1.利用javascript来实现鼠标经过图片放大，鼠标移出图片复原的效果，具体代码如下：scripttype="text/javascript"functioninit(){varimg0=document.getEle
6、mentById("img0");img0.onmouseover=function(){img0.style.width=img0.offsetWidth*1.5+"px"}img0.onmouseout=function(){img0.style.width=img0.offsetWidth/1.5+"px"}}/script2.body中的代码如下：bodyonload="init()"imgid="img0"src="images/4.jpg"//body以上就是本文的全部内容，盼望对大家学习javascript程序设计有所关心。...
