JS实现类似百叶窗下拉菜单效果
废话不多说了，直接给大家贴代码了，具体代码如下所示：
functionleftmove(){
varoLeft_ul=document.getElementById('left_ul');
varaLeft_li=oLeft_ul.children;//获得左侧ul下的第一个子集li
varaleft_ul_hidden=oLeft_ul.getElementsByTagName('ul');
varaleft_span_hidden=oLeft_ul.getElementsByTagName('span');
vararr=[];
varspan_arr=[];
getclassname(aleft_ul_hidden,'cl_hidden',arr)
getclassname(aleft_span_hidden,'sj',span_arr);
for(vari=0;i<aLeft_li.length;i++){
aLeft_li[i].index=i;
aLeft_li[i].onmouseenter=function(){
for(varj=0;j<aLeft_li.length;j++){
move(aLeft_li[j],{height:40});
span_arr[j].style.borderColor='#f2f2f2#f2f2f2#f2f2f2#666';
span_arr[j].style.top='13px';
span_arr[j].style.left='8px';
}
varul_height=arr[this.index].children.length*40
move(aLeft_li[this.index],{height:40+ul_height});
span_arr[this.index].style.borderColor='#666#0ad#0ad#0ad';
span_arr[this.index].style.top='17px';
span_arr[this.index].style.left='6px';
};
aLeft_li[i].onmouseleave=function(){
for(varj=0;j<aLeft_li.length;j++){
move(aLeft_li[j],{height:40});
span_arr[j].style.borderColor='#f2f2f2#f2f2f2#f2f2f2#666';
span_arr[j].style.top='13px';
span_arr[j].style.left='8px';
}
};
arr[i].onmouseover=function(){
for(vari=0;i<arr.length;i++){
span_arr[i].style.borderColor='#f2f2f2#f2f2f2#f2f2f2#666';
span_arr[i].style.top='13px';
span_arr[i].style.left='8px';
}
span_arr[this.parentNode.index].style.borderColor='#666#f2f2f2#f2f2f2#f2f2f2';
span_arr[this.parentNode.index].style.top='17px';
span_arr[this.parentNode.index].style.left='6px';
};
arr[i].onmouseout=function(){
for(vari=0;i<arr.length;i++){
span_arr[i].style.borderColor='#f2f2f2#f2f2f2#f2f2f2#666';
span_arr[i].style.top='13px';
span_arr[i].style.left='8px';
}
span_arr[this.parentNode.index].style.borderColor='#666#0ad#0ad#0ad';
span_arr[this.parentNode.index].style.top='17px';
span_arr[this.parentNode.index].style.left='6px';
};
}
}
leftmove();