<!--頁面載入start-->
<link rel="stylesheet" type="text/css" href="http://love.chengxumiao.net/wp-content/themes/Zenith/css/loader.min.css">
<script type="text/javascript">			
	// 等待所有載入
	$(window).load(function(){
		$('body').addClass('loaded');
		$('#loader-wrapper .load_title').remove();
	});	
</script>    

<div id="loader-wrapper">
    <div id="loader"></div>
    <div class="loader-section section-left"></div>
    <div class="loader-section section-right"></div>
    <div class="load_title">正在載入LoveFeel站點<br><span>V1.0</span></div>
</div>
<!--頁面載入end-->
 

http://love.chengxumiao.net/wp-content/themes/Zenith/css/loader.min.css

.chromeframe {
	margin: 0.2em 0;
	background: #ccc;
	color: #000;
	padding: 0.2em 0;
}

#loader-wrapper {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 999999;
}

#loader {
	display: block;
	position: relative;
	left: 50%;
	top: 50%;
	width: 150px;
	height: 150px;
	margin: -75px 0 0 -75px;
	border-radius: 50%;
	border: 3px solid transparent;
	border-top-color: #FFF;
	-webkit-animation: spin 2s linear infinite;
	-ms-animation: spin 2s linear infinite;
	-moz-animation: spin 2s linear infinite;
	-o-animation: spin 2s linear infinite;
	animation: spin 2s linear infinite;
	z-index: 1001;
}

#loader:before {
	content: "";
	position: absolute;
	top: 5px;
	left: 5px;
	right: 5px;
	bottom: 5px;
	border-radius: 50%;
	border: 3px solid transparent;
	border-top-color: #FFF;
	-webkit-animation: spin 3s linear infinite;
	-moz-animation: spin 3s linear infinite;
	-o-animation: spin 3s linear infinite;
	-ms-animation: spin 3s linear infinite;
	animation: spin 3s linear infinite;
}

#loader:after {
	content: "";
	position: absolute;
	top: 15px;
	left: 15px;
	right: 15px;
	bottom: 15px;
	border-radius: 50%;
	border: 3px solid transparent;
	border-top-color: #FFF;
	-moz-animation: spin 1.5s linear infinite;
	-o-animation: spin 1.5s linear infinite;
	-ms-animation: spin 1.5s linear infinite;
	-webkit-animation: spin 1.5s linear infinite;
	animation: spin 1.5s linear infinite;
}

@-webkit-keyframes spin {
	0% {
		-webkit-transform: rotate(0deg);
		-ms-transform: rotate(0deg);
		transform: rotate(0deg);
	}

	100% {
		-webkit-transform: rotate(360deg);
		-ms-transform: rotate(360deg);
		transform: rotate(360deg);
	}
}

@keyframes spin {
	0% {
		-webkit-transform: rotate(0deg);
		-ms-transform: rotate(0deg);
		transform: rotate(0deg);
	}

	100% {
		-webkit-transform: rotate(360deg);
		-ms-transform: rotate(360deg);
		transform: rotate(360deg);
	}
}

#loader-wrapper .loader-section {
	position: fixed;
	top: 0;
	width: 51%;
	height: 100%;
	background: #1abc9c;
	z-index: 1000;
	-webkit-transform: translateX(0);
	-ms-transform: translateX(0);
	transform: translateX(0);
}

#loader-wrapper .loader-section.section-left {
	left: 0;
}

#loader-wrapper .loader-section.section-right {
	right: 0;
}

.loaded #loader-wrapper .loader-section.section-left {
	-webkit-transform: translateX(-100%);
	-ms-transform: translateX(-100%);
	transform: translateX(-100%);
	-webkit-transition: all 0.7s 0.3s cubic-bezier(0.645,0.045,0.355,1.000);
	transition: all 0.7s 0.3s cubic-bezier(0.645,0.045,0.355,1.000);
}

.loaded #loader-wrapper .loader-section.section-right {
	-webkit-transform: translateX(100%);
	-ms-transform: translateX(100%);
	transform: translateX(100%);
	-webkit-transition: all 0.7s 0.3s cubic-bezier(0.645,0.045,0.355,1.000);
	transition: all 0.7s 0.3s cubic-bezier(0.645,0.045,0.355,1.000);
}

.loaded #loader {
	opacity: 0;
	-webkit-transition: all 0.3s ease-out;
	transition: all 0.3s ease-out;
}

.loaded #loader-wrapper {
	visibility: hidden;
	-webkit-transform: translateY(-100%);
	-ms-transform: translateY(-100%);
	transform: translateY(-100%);
	-webkit-transition: all 0.3s 1s ease-out;
	transition: all 0.3s 1s ease-out;
}

.no-js #loader-wrapper {
	display: none;
}

.no-js h1 {
	color: #222222;
}

#loader-wrapper .load_title {
	font-family: 'Open Sans';
	color: #FFF;
	font-size: 19px;
	width: 100%;
	text-align: center;
	z-index: 9999999999999;
	position: absolute;
	top: 60%;
	opacity: 1;
	line-height: 30px;
}

#loader-wrapper .load_title span {
	font-weight: normal;
	font-style: italic;
	font-size: 13px;
	color: #FFF;
	opacity: 0.5;
}
 

補充一下：如果只是圖片載入完成時程式碼可以這樣寫

$(function(){
	var totalImg = $('img').length;
        var currentImg = 0;
        $('img').on('load',function(){
	    currentImg++;
	    console.log(currentImg)
	    if(currentImg === totalImg){
		alert('所有圖片載入完畢');
		//do something
	    }
       })
})