<script>
if (document.getElementById("newPriceLinks")){
var sfEls = document.getElementById("newPriceLinks").getElementsByTagName("dt");
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onmouseover=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),
"");
}
}
}
</script>请大家帮我解释一下上面的代码!
详细一点好!
谢谢!
if (document.getElementById("newPriceLinks")){
var sfEls = document.getElementById("newPriceLinks").getElementsByTagName("dt");
for (var i=0; i<sfEls.length; i++) {
sfEls[i].onmouseover=function() {
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onmouseout=function() {
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),
"");
}
}
}
</script>请大家帮我解释一下上面的代码!
详细一点好!
谢谢!
{
var sfEls = document.getElementById("newPriceLinks").getElementsByTagName("dt");//设置newPriceLinks元素内的所有dt元素为sfEls
for (var i=0; i<sfEls.length; i++) //遍历每一个dt元素
{
sfEls[i].onmouseover=function() //某个dt元素触发鼠标移上事件,不管dt的classnamewei不为空,取sfhover后为classname
{
this.className+=(this.className.length>0? " ": "") + "sfhover";
}
sfEls[i].onmouseout=function()// 某个dt元素触发鼠标移开事件,用空替换(以sfhover开头或结尾的,且不在"( ?|的classname)
{
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"),"");
}
}
}