/*导航条
*/
$(document).ready(function() {	
	$("#topnav li").prepend("<span></span>"); //Throws an empty span tag right before the a tag
	$("#topnav li").each(function() { //For each list item...
		var linkText = $(this).find("a").html(); //Find the text inside of the a tag
		$(this).find("span").show().html(linkText); //Add the text in the span tag
	}); 
	
	$("#topnav li").hover(function() {	//On hover...
		$(this).find("span").stop().animate({ 
			marginTop: "-46" //Find the span tag and move it up 40 pixels
		}, 250);
	} , function() { //On hover out...
		$(this).find("span").stop().animate({
			marginTop: "0" //Move the span back to its original state (0px)
		}, 250);
	});	
});
/*导航条
*/
/*变大
*/
<!-- 
window.onerror = new Function("return true"); 
var obj = []; 
var scr; 
var spa; 
var img; 
var W; 
var Wi; 
var Hi; 
var wi; 
var hi; 
var Sx; 
var Sy; 
var M; 
var xm; 
var ym; 
var xb = 0; 
var yb = 0; 
var ob =  - 1; 
var cl = false; 

/* needed in standard mode */ 
px = function(x) 
{ 
    return Math.round(x) + "px"; 
} 

/* center image  - do not resize for perf. reason */ 
img_center = function(o) 
{ 
    with(img[o]) 
    { 
        style.left = px( - (width - Wi) / 1000); 
        style.top = px( - (height - Hi) / 1000); 
    } 
} 

////////////////////////////////////////////////////////// 
var Nx = 4; //size grid x 
var Ny = 4; //size grid y 
var Tx = 2; // image width 
var Ty = 2; // image height 
var Mg = 50; // margin 
var SP = 1; // speed 
////////////////////////////////////////////////////////// 

function Cobj(o, x, y) 
{ 
    this.o = o; 
    this.ix = Math.min(Nx - Tx, Math.max(0, Math.round(x - (Tx / 2)))); 
    this.iy = Math.min(Ny - Ty, Math.max(0, Math.round(y - (Ty / 2)))); 
    this.li = ((this.ix * M + this.ix * Sx) - (x * M + x * Sx)) / SP; 
    this.ti = ((this.iy * M + this.iy * Sy) - (y * M + y * Sy)) / SP; 
    this.l = 0; 
    this.t = 0; 
    this.w = 0; 
    this.h = 0; 
    this.s = 0; 
    this.mv = false; 
    this.spa = spa[o].style; 
    this.img = img[o]; 
    this.txt = img[o].alt; 
    img[o].alt = ""; 

    /* zooming loop */ 
    this.zoom = function() 
    { 
        with(this) 
        { 
            l += li * s; 
            t += ti * s; 
            w += wi * s; 
            h += hi * s; 
            if ((s > 0 && w < Wi) || (s < 0 && w > Sx)) 
            { 
                /* force window.event */ 
                window.focus(); 
                /* loop */ 
                setTimeout("obj[" + o + "].zoom()", 20); 
            } 
            else 
            { 
                /* finished */ 
                mv = false; 
                /* set final position */ 
                if (s > 0) 
                { 
                    l = ix * M + ix * Sx; 
                    t = iy * M + iy * Sy; 
                    w = Wi; 
                    h = Hi; 
                } 
                else 
                { 
                    l = x * M + x * Sx; 
                    t = y * M + y * Sy; 
                    w = Sx; 
                    h = Sy; 
                } 
            } 
            /* html animation */ 
            with(spa) 
            { 
                left = px(l); 
                top = px(t); 
                width = px(w); 
                height = px(h); 
                zIndex = Math.round(w); 
            } 
        } 
    } 

    this.click = function() 
    { 
        with(this) 
        { 
            img_center(o); 
            /* zooming logic */ 
            if ( ! mv || cl) 
            { 
                if (s > 0) 
                { 
                    if (cl || Math.abs(xm - xb) > Sx * .4 || Math.abs(ym - yb) > Sy * .4) 
                    { 
                        s =  - 2; 
                        mv = true; 
                        zoom(); 
                        cap.innerHTML = txt; 
                    } 
                } 
                else 
                { 
                    if (cl || ob != o) 
                    { 
                        if (ob >= 0) 
                        { 
                            with(obj[ob]) 
                            { 
                                s =  - 2; 
                                mv = true; 
                                zoom(); 
                            } 
                        } 
                        ob = o; 
                        s = 1; 
                        xb = xm; 
                        yb = ym; 
                        mv = true; 
                        zoom(); 
                        cap.innerHTML = txt; 
                    } 
                } 
            } 
        } 
    } 
     
    /* hook up events */ 
    img[o].onmouseover = img[o].onmousemove = img[o].onmouseout = new Function("cl=false;obj[" + o + "].click()"); 
    img[o].onclick = new Function("cl=true;obj[" + o + "].click()"); 
    img[o].onload = new Function("img_center(" + o + ")"); 

    /* initial display */ 
    this.zoom(); 
} 

/* mouse */ 
document.onmousemove = function(e) 
{ 
    if ( ! e) 
    { 
        e = window.event; 
    } 
    xm = (e.x || e.clientX); 
    ym = (e.y || e.clientY); 
} 

/* init */ 
function load() 
{ 
    /* html elements */ 
    scr = document.getElementById("screen"); 
    spa = scr.getElementsByTagName("span"); 
    img = scr.getElementsByTagName("img"); 
    cap = document.getElementById("caption"); 
     
    /* mouseover border */  
    document.getElementById("border").onmouseover = function() 
    { 
        cl = true; 
        if(ob >= 0 && obj[ob].s > 0) obj[ob].click(); 
        ob = -1; 
    } 

    /* global variables */ 
    W = parseInt(scr.style.width); 
    H = parseInt(scr.style.height); 
    M = W / Mg; 
    Sx = (W - (Nx - 1) * M) / Nx; 
    Sy = (H - (Ny - 1) * M) / Ny; 
    Wi = Tx * Sx + (Tx - 1) * M; 
    Hi = Ty * Sy + (Ty - 1) * M; 
    SP = M * Tx * SP; 
    wi = (Wi - Sx) / SP; 
    hi = (Hi - Sy) / SP; 
     
    /* create objects */ 
    for (k = 0, i = 0; i < Nx; i ++) 
    { 
        for (j = 0; j < Ny; j ++) 
        { 
            obj[k] = new Cobj(k ++, i, j); 
        } 
    } 
} 
//--> 
<!--
/*
*/
-->