//-------------------------ÅǸ޴º------------------------------------------//
function initTabMenu(mytab) {
 var myList = document.getElementById(mytab);
 var mytab = myList.getElementsByTagName("dt");
 var myDD = myList.getElementsByTagName("dd");
   
 for(var i=0;i<mytab.length; i++) {
 mytab[i].children[0].onfocus=mytab[i].children[0].onmouseover=function() {
    for(var k=0; k<mytab.length; k++) {
        myDD[k].style.display="none";
    }
    var theNext=this.parentNode.nextSibling;
    if(theNext.nodeType==3) theNext=theNext.nextSibling;
    theNext.style.display="block";
   
    for(var k=0; k<mytab.length; k++) {
        var theTab=mytab[k].children[0].children[0];
        theTab.src=theTab.src.replace("_ov.gif",".gif");
    }
    this.children[0].src=this.children[0].src.replace(".gif","_ov.gif");
  }
 }
}