html联动菜单Demo
var arr = [
['朝阳','海淀','房山'],
['济南','青岛','烟台']
]
function ld()
{
var sel = document.getElementById('sheng');
var opt = "";
if(sel.value=='-1'){document.getElementById('shi').innerHTML = opt;}
for(va
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2015-08-17 20:33:28 ·
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