這樣怎么不行呢
function li1(){
? ?document.getElementById("l1").style.display = "block"
? ?document.getElementById("l2").style.display = "none"
? ?document.getElementById("l3").style.display = "none"
}
<li id=l1 onmouseover="li1()">房產(chǎn)</li> ??
<li id=l2 onmouseover="li2()">家居</li> ? ? ? ? ?
<li id=l3 onmouseover="li3()">二手房</li>
2017-01-06
<li id="l1" onmouseover="li1()">房產(chǎn)</li> ??
<li id="l2" onmouseover="li2()">家居</li> ? ? ? ? ?
<li id="l3" onmouseover="li3()">二手房</li>