//搜索
function fn_submit()
{
    if(findform.searchText.value == "")
    {
        alert("Please input a keyword!");
        return false ;
    }
    else 
        return true;
}

//导航
function menuFix() { 
	var sfEls = document.getElementById("sub").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;