BoaHock

one two three four var tu=document.getElementById("tu"); function test(obj){ var index=obj.selectedIndex; tu.src=obj.options[index].value; } scity("prop","cit"); var provinc

asdf

style.top style.left var one=document.getElementById("one"); alert(one.style.width); alert(one.offsetWidth); offsetWidth offsetHeight offsetTop//距离上一级的顶top的偏移距离 offsetLeft body{