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<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link href="" rel="stylesheet" type="text/css">
<script type="text/javascript">
function dada( evt ){
var obj = event.target;
var s = obj.value;
obj.value = parseFloat(s) + 1;
}
</script>
</head>
<body>
<input type="button" value="1" id="btn1" onclick="dada(event)"/>
<input type="button" value="1" id="btn2" onclick="dada(event)" />
<input type="button" value="1" id="btn3" onclick="dada(event)"/>
</body>
</html>
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this
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<link href="" rel="stylesheet" type="text/css">
<script type="text/javascript">
function dada( myInput ){
myInput.value = parseFloat(myInput.value) + 1;
}
</script>
</head>
<body>
<input type="button" value="1" id="btn1" onclick="dada(this)"/>
<input type="button" value="1" id="btn2" onclick="dada(this)" />
<input type="button" value="1" id="btn3" onclick="dada(this)"/>
</body>
</html>
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原文地址：http://www.cnblogs.com/havoe/p/4474280.html
