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827天前[javascript]代码库 |
<!DOCTYPE html> |
<html> |
<head> |
<title>计算器</title> |
<meta charset="utf-8" /> |
<style type="text/css"> |
.panel { |
border: 4px solid #ddd; |
width: 192px; |
margin: 100px auto; |
/*border-radius: 6px;*/ |
} |
.panel p, .panel input { |
font-family: "微软雅黑"; |
font-size: 20px; |
margin: 4px; |
float: left; |
/*border-radius: 4px;*/ |
} |
.panel p { |
width: 122px; |
height: 26px; |
border: 1px solid #ddd; |
padding: 6px; |
overflow: hidden; |
} |
.panel input { |
width: 40px; |
height: 40px; |
border:1px solid #ddd; |
} |
</style> |
<script type="text/javascript"> |
window.onload=function(){ |
//给div绑定单击事件 |
var div = document.getElementById("jsq"); |
div.onclick = function(e){ |
//获取事件源 |
var obj = e.srcElement || e.target; |
//从中找出按钮 |
console.log(1); |
if(obj.nodeName == "INPUT"){ |
var p = document.getElementById("screen"); |
//对不同的按钮做不同的处理 |
if(obj.value=="C"){ |
p.innerHTML = ""; |
}else if(obj.value=="="){ |
try{ |
p.innerHTML = eval(p.innerHTML); |
}catch(ex){ |
p.innerHTML = "Error"; |
} |
}else{ |
p.innerHTML +=obj.value; |
} |
} |
} |
} |
</script> |
</head> |
<body> |
<div class="panel" id="jsq"> |
<div> |
<p id="screen"></p> |
<input type="button" value="C"> |
<div style="clear:both"></div> |
</div> |
<div> |
<input type="button" value="7"> |
<input type="button" value="8"> |
<input type="button" value="9"> |
<input type="button" value="/"> |
|
<input type="button" value="4"> |
<input type="button" value="5"> |
<input type="button" value="6"> |
<input type="button" value="*"> |
|
<input type="button" value="1"> |
<input type="button" value="2"> |
<input type="button" value="3"> |
<input type="button" value="-"> |
|
<input type="button" value="0"> |
<input type="button" value="."> |
<input type="button" value="="> |
<input type="button" value="+"> |
|
<div style="clear:both"></div> |
</div> |
</div> |
</body> |
</html> |
初级程序员
by: lbq 发表于：2017-09-13 19:19:23 顶(0) | 踩(0) 回复
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