$(document).ready(function() {
    mainmenu();
    setLogoImg();
});
//设置导航菜单
function mainmenu(){
$(" #nav ul ").css({display: "none"}); // Opera Fix
$(" #nav li").hover(function(){
		$(this).find('ul:first').css({visibility: "visible",display: "none"}).show(400);
		},function(){
		$(this).find('ul:first').css({visibility: "hidden"});
		});
$("#search").css({display: "none"}); // Opera Fix
$(".footer .right").hover(function(){
			var offset = $(this).offset();
			$("#search").css("left",offset.left+50);
			$("#search").css("top",offset.top-$("#search").height()+5);
			$("#search").show();
		},function(){
			$("#search").hide();
		});
}
//设置LOGO
function setLogoImg(){
	var w=window.screen.availWidth;
	var imgw=$(".indexlogo img:first");
	if(w==800)
	{
		$(imgw).attr("src","/Images/logo1.gif");
	}
	else if(w==1024)
	{
		$(imgw).attr("src","/Images/logo.gif");
	}
	else if(w==1280)
	{
		$(imgw).attr("src","/Images/logo2.gif");
	}
	else
	{
		$(imgw).attr("src","/Images/logo.gif");
	}
}


//查询信息
function onSeach() {
    var keyword = $.trim($("#searchField").val());
    if (keyword.length > 0) {
        return true;
    }
    alert("请输入查询信息");
    return false;
}