js练习【DOM操作】

浏览数：56 / 时间：2015年06月09日

完成效果：

演示地址：http://codepen.io/anon/pen/jPbYWq

技术分享

HTML：

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>[js小练习]：DOM操作</title>
</head>
<body>

<div id="testField">
	
</div>

<div class="coverBg" id="coverBox">
	<div class="selBox">
	
	 <dl>
	 	<dt>选择颜色</dt>
	 	<dd id="red" class="commonEle">红</dd>
	    <dd id="green" class="commonEle">绿</dd>
	 	<dd id="blue" class="commonEle">蓝</dd>
	 </dl>	

	 <dl>
	 	<dt>定制尺寸</dt>
        <dd class="comEle">
        <label for="olength">输入长度值</label>
        <input type="text" id="olength" name="length">
        </dd>

        <dd class="comEle">
        <label for="owidth">输入宽度值</label>
        <input type="text" id="owidth" name="width">
        </dd>
	 </dl>

    <dl class="btn-list">
    	<dd><button class="btnEle" id="offBtn" >取消</button></dd>
    	<dd><button class="btnEle btn-save" id="saveBtn">保存</button></dd>
    </dl>

	</div>
</div>

	
</body>
</html>

界面呈现：

	*{
		padding: 0;
		margin:0;
	}

	body{
		font-family: "microsoft yahei";
	}

   #testField{
   	width: 120px;
   	height: 120px;
   	background-color: #333;
   	position: absolute;
   	top: 0;
   	right: 0;
   	bottom: 0;
   	left: 0;
   	margin:auto;
   }

   .coverBg{ /*遮罩层*/
   	display: none;
   	position: fixed;
   	width: 100%;
   	height: 100%;
   	background-color: rgba(0,0,0,.4);
   }

   .selBox{
    width: 200px;
    height: 300px;
    padding:10px;
    font-size: 13px;
    border-radius:3px;
    background-color: rgba(255,255,255,.4);
    position: absolute;
    top: 0;
    right: -350px;
    bottom: 0;
    left: 0;
    margin:auto;
    box-shadow: 0 0 6px rgba(0,0,0,.3);

   }

   dl{
   	display: inline-block;
   }

   dl dt{
   	font-size: 13px;
   	font-weight: bold;
   	margin: 5px 0;
   	padding-bottom: 5px;
   	border-bottom: 1px solid #f7f7f7;
   }

   .commonEle{    
       display:inline-block;
    　　width: 50px;
   	height: 50px;
   	border-radius: 25px;
   	text-align: center;
   	line-height: 50px;
   	color:#fff;
   	float: left;
   	margin:5px 8px;
   }

   #red{
   	background-color: red;
   }

   #green{
   	background-color: green;
   }

   #blue{
   	background-color: blue;
   }

   .comEle {
  margin: 10px;
}

.comEle input {
  margin: 5px 0;
  width: 100%;
  height: 24px;
  border: 1px solid #999;
  border-radius: 3px;
  box-shadow: inset 0 0 3px rgba(0,0,0,.3);
}

.btn-list dd{
	float: left;
}

.btnEle {
  padding: 5px 25px;
  border: 0;
  outline: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,.075);
  border-radius: 2px;
  margin: 5px 11px;
  color: #666;
}

.btn-save{
  background-image: -webkit-gradient(linear, left top, left bottom, from(#e3262e), to(#ab171e));
  background-image: -webkit-linear-gradient(#e3262e, #ab171e);
  background-image: linear-gradient(#e3262e, #ab171e);
  text-shadow: 0 -1px rgba(0, 0, 0, 0.11);
  color: #fff;
}

JS部分：

	
var oField=document.getElementById(‘testField‘);
var oCover=document.getElementById(‘coverBox‘);
var oRed=document.getElementById(‘red‘);
var oGreen=document.getElementById(‘green‘);
var oBlue=document.getElementById(‘blue‘);
var olength=document.getElementById(‘olength‘);
var owidth=document.getElementById(‘owidth‘);
var oOffBtn=document.getElementById(‘offBtn‘);
var oSaveBtn=document.getElementById(‘saveBtn‘);


olength.oninput=function(){
var h_value=olength.value +"px";
oField.style.height=h_value;	
}
owidth.oninput=function(){
var w_value=owidth.value +"px";
oField.style.width=w_value;	
}

oField.onclick=function(){

oCover.style.display="block";

}

oRed.onclick=function(){
	oField.style.backgroundColor="red";
}

oGreen.onclick=function(){
	oField.style.backgroundColor="green";
}

oBlue.onclick=function(){
	oField.style.backgroundColor="blue";
}

oOffBtn.onclick=function(){

	oCover.style.display="none";
	oField.style.height="120px";
	oField.style.width="120px";
	oField.style.backgroundColor="#333";

	//取消的时候清空input数值
        olength.value=‘‘;
        owidth.value=‘‘;
}


oSaveBtn.onclick=function(){
	oCover.style.display="none";

	//保存的时候清空input数值
	olength.value=‘‘;
        owidth.value=‘‘;
}

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js练习【DOM操作】