效果說明：
????實現鼠標移入和移出對象時的，對象背景漸隱漸現的動態效果。

<SCRIPT language=JavaScript>
<!--
??? function over(obj, col,idNum) {
??????? changeColor(obj, col);
??? }
??? function out(obj,idNum) {
??????? changeColor(obj, "#3B77AB");
??? }
??? function changeColor(obj, col) {
??????? obj.filters.blendTrans.apply();
??? ??? obj.style.backgroundColor= col;
??????? obj.filters.blendTrans.play();
??? }
//-->
</SCRIPT>

<style>
??? .login {
??????? width:100px;
??????? height:19px;
??????? background-color:#3B77AB;
??????? filter: blendTrans(duration=0.5);
??? }
</style>

<div class="login" onMouseOver="over(this, '#EFF8E2',2)" onMouseOut="out(this,2)" >
??? AAAAAAAAA
??? AAAAAAAAA
??? AAAAAAAAA
</div>