即使尝试使用全局声明，通过下拉菜单输入的值也不会反射(reflect)在变量 event1 和 event2 中。我如何将值存储到两个变量并将其传递给 javascript？ 非常感谢。
<!DOCTYPE HTML>
<html>
<head>
<title> Correlation Does Not Imply Causation </title>
<script type="text/javascript">
var event1,event2;
function main(e11,e22)
{event1=e11;
event2=e22;}
window.onload = function () {
var crimerain=[{x:1780330,y:42053.0},{x:1716120,y:51667.5 },{x: 1832015 ,y: 47647.5 },{x: 1822602 ,y: 51539.5 },{x: 1878293 ,y: 49135.3 },{x: 1989673 ,y: 52750.1 },{x: 2093379 ,y: 48508.1 },{x: 2121345 ,y: 42877.4 },{x: 2224831 ,y: 53483.1 },{x: 2325575 ,y: 49935.8 },{x: 2387188 ,y: 45813.1 },{x: 2647722 ,y: 53521.8 }];
var crimeexport=[{x:1780330,y:49},{x:1716120,y:59 },{x: 1832015 ,y: 77 },{x: 1822602 ,y: 100 },{x: 1878293 ,y: 122},{x: 1989673 ,y: 150 },{x: 2093379 ,y: 195 },{x: 2121345 ,y: 165 },{x: 2224831 ,y: 226 },{x: 2325575 ,y: 303},{x: 2387188 ,y: 297 },{x: 2647722 ,y: 312}];
var odsexport=[{x:50104.0,y:49},{x:88368.0,y:59 },{x: 52469.0 ,y: 77 },{x: 55293.0 ,y: 100 },{x: 53486.1 ,y: 122},{x: 51527.6 ,y: 150 },{x: 53118.9 ,y: 195 },{x: 58340.2,y: 165 },{x: 58905.7 ,y: 226 },{x:63154.44 ,y: 303},{x: 66217.62 ,y: 297 },{x: 63589.841 ,y: 312}];
var odsrain=[{x:50104.0,y:42053.0},{x:88368.0,y:51667.5 },{x: 52469.0 ,y: 47647.5 },{x: 55293.0,y: 51539.5 },{x: 53486.1,y: 49135.3 },{x:51527.6 ,y: 52750.1 },{x:53118.9 ,y: 48508.1 },{x: 58340.2,y: 42877.4 },{x:58905.7 ,y: 53483.1 },{x: 63154.44,y: 49935.8 },{x:66217.62 ,y: 45813.1 },{x: 63589.841 ,y: 53521.8 }];
var dps= [], xaxis, yaxis;
if (event1==1 && event2==1)
{dps=crimerain
xaxis="Cognizable Crime Rate"
yaxis="Rainfall(cm)"
}
else if (event1==1 && event2==2)
{ dps=crimeexport
xaxis="Cognizable Crime Rate"
yaxis="Export (Goods) Growth (US $Billion)"}
else if (event1==2 && event2==1)
{dps=odsrain
xaxis="Production of Ozone Depleting Substances"
yaxis="Rainfall(cm)"}
else if (event1==2 && event2==2)
{dps=odsexport
xaxis="Production of Ozone Depleting Substances"
yaxis="Export (Goods) Growth (US $Billion)"}
var chart = new CanvasJS.Chart("chartContainer",
{
zoomEnabled: true,
animationEnabled: true,
axisX:{
title: xaxis,
valueFormatString: "#",
},
axisY:{
title: yaxis,
valueFormatString: "#"
},
legend: {
verticalAlign: "bottom",
horizontalAlign: "left"
},
data: [
{
cursor: "pointer",
type: "scatter",
highlightEnabled: true,
color: "#3B5998",
markerBorderColor : "white",
markerBorderThickness: 2,
legendText: "Each circle represents one year",
showInLegend: "true",
markerType: "circle",
markerColor: "#3B5998",
toolTipContent: "<span style='\"'color:White;'\"'><strong>xaxis</strong></span> {x}<br/> <span style='\"'color: White;'\"'><strong>yaxis</strong></span> {y}",
dataPoints:dps
}
]
});
chart.render();
}
</script>
<script type="text/javascript" src="C:\Users\Rishika\Downloads\canvasjs-1.7.0\canvasjs.min.js"></script>
<link href='https://fonts.googleapis.com/css?family=Montserrat' rel='stylesheet' type='text/css'>
</head>
<body bgcolor="#3B5998">
<div style="color:white; font-family: 'Montserrat', sans-serif;"><center>
<p style="font-size:40px"><b><br/><br/><br/><br/>CORRELATION DOES NOT IMPLY CAUSATION</b></p>
Statistically determine the relation between two random events
<br/><br/><br/>
<form>
<select style="color:white; width: 150px; height:40px; font-size:17px; font-family: 'Montserrat', sans-serif; background-color:#3B5998; border:3px solid white;" name="event1">
<option id="e1" value="1">Crime Rate</option>
<option id="e1" value="2">Ozone Depletion</option>
</select>
<select style="color:white; width: 150px; height:40px; font-size:17px; font-family: 'Montserrat', sans-serif; background-color:#3B5998; border:3px solid white;" name="event2">
<option id "e2" value="1">Rainfall</option>
<option id="e2" value="2">Export Growth</option>
</select><br/><br/><br/>
<input style="color:white; width: 150px; height:40px; font-size:17px; font-family: 'Montserrat', sans-serif; background-color:#3B5998; border:3px solid white;" type="submit" value="Submit" onclick="func1(document.getElementByName('event1').value,document.getElementByName('event2').value)">
</form>
</p>
<div id="chartContainer" style="height: 300px; width: 100%;">
</div>
</body>
</html>最佳答案
您将使用 document.getElementsByName("event1")[0]获得 <select> 之一元素。然后获取选中的值<option> :
var ele = document.getElementsByName("event1")[0];
event1 = ele.options[ele.selectedIndex].value;
对于 event2 也会做同样的事情.
关于javascript - 在表单中传递值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32916295/