function testit(arr)
{
var ret = false;
if( arr.constructor==Array ) ret = true ;
/*if(ret) alert("it is a Array");
else alert("it is not a Array");*/
return ret;
}
{
var ret = false;
if( arr.constructor==Array ) ret = true ;
/*if(ret) alert("it is a Array");
else alert("it is not a Array");*/
return ret;
}
返回false:说明不是