js-css日常

背景圖自適應

js:

$(".bg-img").css("width", document.body.clientWidth);

css:

.bg_img
{
    background-image: url(/img/bg.png);
    background-attachment:fixed;
    background-repeat:no-repeat;
    background-size:cover;
    -moz-background-size:cover;
    -webkit-background-size:cover;
}
//適應移動設備
.bg-img
{
    position: absolute;
    left: 0px;
    top: 0px;
    z-index:-2;
}

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移動設備屏幕大小

alert(document.body.clientWidth+" "+document.body.clientHeight );

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移動設備，禁止滾動

document.body.addEventListener(
    'touchmove', 
    function (event)
    {
        event.preventDefault();
    },
    false
);

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透明背景

.bg-white
{
    background-color:rgba(255, 255, 255, 0.50);
    padding: 25px;
    margin-top:20px;
}

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JS引用JS

<script type=text/javascript>
    if (typeof SWFObject == "undefined") { 
        document.write('<scr' + 'ipt type="text/javascript" src="/scripts/XXX.js"></scr' + 'ipt>');}
</script> 

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setTimeout

setTimeout 不能在$(doc..).ready(function(){});中使用 。
想調用傳參數方法，用function(){ method(param);}

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jq show()/hide()

該兩方法會將display：none
如果是row結構，show回來時記得將display：inline，否則會變形

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jq each

如果將統一class或標籤的屬性修改記得用each，否則會有些class或標籤的屬性修改不成功

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