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calc.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>比例计算器</title>
<style>
body { font-family: Arial, sans-serif; }
.calculator { width: 260px; margin: 10px auto; padding: 10px; border: 1px solid #ccc; border-radius: 5px; }
.calculator input { width: 50%; padding: 8px; margin: 5px 0; box-sizing: border-box; }
.calculator button { width: 100%; padding: 10px; background-color: #007BFF; color: white; border: none; border-radius: 4px; cursor: pointer; }
.calculator calc { width: 120px; background-color: #999999; }
*{margin:0;padding:0;}
..a{width: 120px;height: 30px;border:1px solid blue;}
..b{width: 255px;height: 30px;border:1px solid green;}
</style>
<script type="text/JavaScript">
<!--
function MM_preloadImages() { //v3.0
var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImgRestore() { //v3.0
var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}
function MM_swapImage() { //v3.0
var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
//-->
</script>
</head>
<body onLoad="MM_preloadImages('https://avatars.githubusercontent.com/u/14555503?v=4','lo.png')">
<div class="calculator">
<h2>比例计算器</h2>
<form id="ratioForm">
<label>
<div align="center">比例</div>
</label>
<div>
<p align="center">
<input type="number" class="a" name="number" id="ratioDenominator" value="16" required>
<input type="number" class="a" name="number2" id="ratioNumerator" value="9" required>
</p>
</div>
<input type="button" value="计算" onClick="calculateRatio()" >
<p>
<input type="number" id="number1" value="1920" class="a" required>
<p class="calc" id="result"></p>
<!--
<button type="submit">计算</button>
-->
</form>
<div>
</div>
</div>
<div align="center" class="calculator">
<a href=".\">返回</a>
</div>
<script>
function calculateRatio() {
var number1 = parseFloat(document.getElementById('number1').value);
var numerator = parseFloat(document.getElementById('ratioNumerator').value);
var denominator = parseFloat(document.getElementById('ratioDenominator').value);
var ratio = numerator / denominator;
var result = number1 * ratio;
document.getElementById('result').innerText = '结果: ' + result;
}
</script>
</body>
</html>