关于网页中的flash属性

这样试试
function changeMovie(){
    theObject=document.getElementsByTagName("param");
    for (var i=0;i<theObject.length;i++){
        if (theObject[i].parent.id=="a" && theObject[i].name=="movie"){
            theObject[i].value="'images/fzswf/fz2.swf";
            break;
        }
    }
}
<input type="button" onclick="changeMovie()">