<head runat="server">
<title>无标题页</title>
<script language="javascript" type="text/javascript">
function tot()
{
var aa=document.getElementById("Text1")
var bb=document.getElementById("Text2")
var cc=document.getElementById("Text3")
if(aa.value!=""&&bb.value!="")
{
cc.value=parseInt(aa.value)*0.3+parseInt(bb.value)*0.7
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="Text1" type="text" onkeyup="tot()"/>+<input id="Text2" type="text" onkeyup="tot()"/>=<input id="Text3" type="text" readonly="readonly"/>
</div>
</form>
</body>
标签：aa,bb,求和,value,getElementById,自动,文本框,var,document From： https://www.cnblogs.com/xingxing15/p/17677274.html