山海经

<script language="javascript" type="text/javascript">

/* toggle() checks to see if the images has already been faded

or not and sends the appropriate variables to opacity(); */

function toggle(el,milli) {

// Get the opacity style parameter from the image

var currOpacity = document.getElementById(el).style.opacity;

if(currOpacity != 0) { // if not faded

fade(el, milli, 100, 0);

} else { // else the images is already faded

fade(el, milli, 0, 100);

}

}

/* changeOpacity() uses three different opacity settings to

achieve a cross-browser opacity changing function. This

function can also be used to directly change the opacity

of an element. */

function changeOpacity(el,opacity) {

var image = document.getElementById(el);

// For Mozilla

image.style.MozOpacity = (opacity / 100);

// For IE

image.style.filter = "alpha(opacity=" + opacity + ")";

// For others

image.style.opacity = (opacity / 100);

}

/* fade() will fade the image in or out based on the starting

and ending opacity settings. The speed of the fade is

determined by the variable milli (total time of the fade

in milliseconds)*/

function fade(el,milli,start,end) {

var fadeTime = Math.round(milli/100);

var i = 0; // Fade Timer

// Fade in

if(start < end) {

for(j = start; j <= end; j++) {

// define the expression to be called in setTimeout()

var expr = "changeOpacity('" + el + "'," + j + ")";

var timeout = i * fadeTime;

// setTimeout will call 'expr' after 'timeout' milliseconds

setTimeout(expr,timeout);

i++;

}

}

// Fade out

else if(start > end) {

for(j = start; j >= end; j--) {

var expr = "changeOpacity('" + el + "'," + j + ")";

var timeout = i * fadeTime;

setTimeout(expr,timeout);

i++;

}

}

}

</script>

<div class="enter" onClick="javascript:toggle('wise', 3000); this.style.display='none';

document.getElementById('june').style.display=''">

<img src="http://img.juhife542d.com图片网址"

style="opacity:0.4;filter:alpha(opacity=40)"

onmouseover="this.style.opacity=1;this.filters.alpha.opacity=100"

onmouseout="this.style.opacity=0.7;this.filters.alpha.opacity=40"/>

</div>

<div id="wise" style="filter : alpha(opacity=0); -moz-opacity : 0; opacity : 0;">

<div id="june" style="display : none;">

.enter {

text-align: center;

margin-top: 200px;

}