//首页导航菜单效果
function menuFix() { 
var sfEls = document.getElementById("nav").getElementsByTagName("li"); 
for (var i=0; i<sfEls.length; i++) { 
sfEls[i].onmouseover=function() { 
this.className+=(this.className.length>0? " ": "") + "sfhover"; 
} 
sfEls[i].onMouseDown=function() { 
this.className+=(this.className.length>0? " ": "") + "sfhover"; 
} 
sfEls[i].onMouseUp=function() { 
this.className+=(this.className.length>0? " ": "") + "sfhover"; 
} 
sfEls[i].onmouseout=function() { 
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"), 

""); 
} 
} 
} 
window.onload=menuFix; 
//选项卡一
function setTab(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con=document.getElementById("con_"+name+"_"+i);
  menu.className=i==cursel?"hover":"";
  con.style.display=i==cursel?"block":"none";
 }
 
}

//选项卡二
function setTab2(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con2=document.getElementById("con2_"+name+"_"+i);
  menu.className=i==cursel?"hover":"";
  con2.style.display=i==cursel?"block":"none";
 }
 
}

//选项卡三
function setTab3(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con3=document.getElementById("con3_"+name+"_"+i);
  menu.className=i==cursel?"hover":"";
  con3.style.display=i==cursel?"block":"none";
 }
 
}

//选项卡四
function setTab4(name,cursel,n){
 for(i=1;i<=n;i++){
  var menu=document.getElementById(name+i);
  var con4=document.getElementById("con4_"+name+"_"+i);
  menu.className=i==cursel?"hover":"";
  con4.style.display=i==cursel?"block":"none";
 }
 
}