我试图将用户的BMI评分和评论存储到mysql数据库中。我可以存储他们的身高和体重,但不包括他们的分数和bmi的评论。如有任何建议,将不胜感激。
<script type="text/javascript">
function Calculate()
{
//Obtain user inputs
var height=Number(document.getElementById("height").value);
var heightunits=document.getElementById("heightunits").value;
var weight=Number(document.getElementById("weight").value);
var weightunits=document.getElementById("weightunits").value;
//Convert all units to metric
if (heightunits=="inches") height/=39.3700787;
if (weightunits=="lb") weight/=2.20462;
if (heightunits=="cm") height/=100;
//Perform calculation
var BMI=weight/Math.pow(height,2);
//Display result of calculation
document.getElementById("output").innerText=Math.round(BMI*100)/100;
var output = Math.round(BMI*100)/100
if (output<18.5)
document.getElementById("comment").innerText = "Underweight";
else if (output>=18.5 && output<=25)
document.getElementById("comment").innerText = "Normal";
else if (output>=25 && output<=30)
document.getElementById("comment").innerText = "Obese";
else if (output>30)
document.getElementById("comment").innerText = "Overweight";
// document.getElementById("answer").value = output;
}
</script>
</head>
<body>
<div>BMI Calculator</div>
<input type="button" value="Calculate" onclick="Calculate(this.form);">
<input type="submit" name="savebmi" value="SaveBMI">
<p class="font-3">Your BMI is: <span name="output" value="output" type="float" id="output" class="textInput"></span></p>
<p class="font-3">This means you are: <span name="comment" type="text" id="comment"></span> </p>发布于 2017-03-08 20:31:09
您可以做的一件事是将span标记更改为input标记,然后更改JavaScript以设置value属性而不是innerText。然后,当您提交表单时,它将把这些值传递给PHP脚本。
如果不喜欢框的外观,则可以将输入框的样式设置为与段落文本匹配。例如,从style='border:none开始。
JavaScript
//Display result of calculation
document.getElementById("output").value=Math.round(BMI*100)/100;
var output = Math.round(BMI*100)/100
if (output<18.5)
document.getElementById("comment").value = "Underweight";
else if (output>=18.5 && output<=25)
document.getElementById("comment").value = "Normal";
else if (output>=25 && output<=30)
document.getElementById("comment").value = "Obese";
else if (output>30)
document.getElementById("comment").value = "Overweight";
// document.getElementById("answer").value = output; HTML
<p class="font-3">Your BMI is: <input name="output" type="float" id="output" class="textInput" style="border:none" /></p>
<p class="font-3">This means you are: <input name="comment" type="text" id="comment" style="border:none" /></p>发布于 2017-03-08 20:22:35
具有id输出和注释的元素不是input元素,而是span元素,因此它们不会传递给PHP。您应该尝试通过AJAX将其传递给您的脚本,然后可以将这些值添加到请求中。示例:
var req = new XMLHttpRequest();
req.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
// Whatever you want to do with the php response
}
}
req.open("POST", "script.php", true);
req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
req.send("output=" + output + "&weight=" + weight + ...);另一个解决方法是使用隐藏的input元素,但是您应该创建一个函数来验证这些元素,或者使其不可编辑。
发布于 2017-03-08 20:36:19
这是一个适合你的问题的解决方案。
//Display result of calculation
var bmi_result = Math.round(BMI*100)/100;
document.getElementById("output").innerText=bmi_result;
document.getElementById("form_output").innerText=bmi_result;
var comment = '';
if (bmi_result<18.5) {
comment = "Underweight";
} else if (bmi_result>=18.5 && output<=25) {
comment = "Normal";
} else if (bmi_result>=25 && output<=30) {
comment = "Obese";
} else if (bmi_result>30) {
comment = "Overweight";
}
document.getElementById("comment").innerText = comment;
document.getElementById("form_comment").innerText = comment;以你的形式:
<input type="hidden" id="form_output" name="output" value="">
<input type="hidden" id="form_comment" name="comment" value="">
<input type="button" value="Calculate" onclick="Calculate(this.form);">https://stackoverflow.com/questions/42680852
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