動態獲取div的高度 隨着窗口變化而變化

// 1、jq法

<script> 
    var winHeight = $(window).height(); 
    $("#show").css("height",winHeight); 
    $(window).resize(function() { 
        winHeight = $(window).height(); 
        $("#show").css("height",winHeight); 
    });
</script> 

 

 

//2、js

<div id="test" style=" background: #ccc"></div>
 
<script type="text/javascript">
autodivheight();
function autodivheight(){ //函數：獲取尺寸
    //獲取瀏覽器窗口高度
    var winHeight=0;
    if (window.innerHeight){
        winHeight = window.innerHeight;
    }
    else if ((document.body) && (document.body.clientHeight)){
        winHeight = document.body.clientHeight;
    }
    //通過深入Document內部對body進行檢測，獲取瀏覽器窗口高度
    if (document.documentElement && document.documentElement.clientHeight){
        winHeight = document.documentElement.clientHeight;
    }
    //DIV高度為瀏覽器窗口的高度
    //document.getElementById("test").style.height= winHeight +"px";
    //DIV高度為瀏覽器窗口高度的一半
    document.getElementById("test").style.height= winHeight/2 +"px";
}
window.onresize=autodivheight; //瀏覽器窗口發生變化時同時變化DIV高度
</script>