[英]Using radio buttons to change an image
所以我有一些單選按鈕:
<input type="radio" name="option" value="GDP" id="GDP_option" checked>GDP
<input type="radio" name="option" value="Population" id="Population_option" >Population
<input type="radio" name="option" value="None" id="None_option" > None
我也有一個提交按鈕:
<input type="submit" name="submit" id="submit" onsubmit="changeFormula()">
和圖片:
<img src="formula_gdp.gif" name="formula" id="formula">
當按下提交按鈕時,我想根據選中的單選按鈕將圖像src更改為其他內容。 這是我嘗試過的:
function changeFormula(){
var radio = document.getElementsByName('option');
var formula = document.getElementsByName('formula')
if (radio[1].checked){
formula.src = "formula_gdp.gif";
}
if (radio[2].checked){
formula.src = "formula_pop.gif";
}
if (radio[3].checked){
formula.src = "formula_none.gif";
}
}
您可以使用Jquery來執行此操作,如下所示。
<script type='text/javascript'>
$(document).ready(function(){
$("input:radio[name=option]").click(function() {
var value = $(this).val();
var image_name;
if(value == 'GDP'){
image_name = "formula_gdp.gif";
}else{
if(value == 'Population'){
image_name = "formula_pop.gif";
}else{
image_name = "formula_none.gif";
}
}
$('#formula').attr('src', image_name);
});
});
</script>
僅您將需要這三個單選按鈕字段和Image標簽..不需要Submit按鈕...
<input type="radio" name="option" value="GDP" id="GDP_option" checked>GDP
<input type="radio" name="option" value="Population" id="Population_option" >Population
<input type="radio" name="option" value="None" id="None_option" > None
<img src="formula_gdp.gif" name="formula" id="formula">
希望它將對您有所幫助。.如果您還需要其他東西...那么您可以通知我....
嘗試這個
$(document).ready(function() {
$("input:radio[name=vf]").change(function() { //name = button group name
if (this.value == "0") {
$("#vf").attr( //image file name
'src', '/images/onestep/lime/vf.jpg' //image path
);
}
else if (this.value == "8") {
$("#vf").attr( //image file name
'src', '/images/onestep/vf.jpg' //image path
);
}
else {
$("#vf").attr( //image file name
'src', '/images/onestep/vf.jpg' //image path
);
}
});
使用if(document.getElementById('element_id').checked)
以獲得更好的結果。
添加事件<input type="submit" name="submit" id="submit" onsubmit="changeFormula(e)">
function changeFormula(e){
e.stopPropagation();
var radio = document.getElementsByName('option');
var formula = document.getElementsByName('formula')
if (radio[1].checked){
formula.src = "formula_gdp.gif";
}
if (radio[2].checked){
formula.src = "formula_pop.gif";
}
if (radio[3].checked){
formula.src = "formula_none.gif";
}
}
如果您不介意使用Jquery:
$(document).ready(function() {
$('#submit').click(function(e) {
e.preventDefault();
if($('#GDP_option').is(':checked')) {
$('#formula').attr('src','formula_gdp.gif')
}
if($('#Population_option').is(':checked')) { $('#formula').attr('src','formula_pop.gif')
}
if($('#None_option').is(':checked')) {
$('#formula').attr('src','formula_none.gif')
}
})
})
<input type="radio" name="option" value="GDP" id="GDP_option" checked>GDP
<input type="radio" name="option" value="Population" id="Population_option">Population
<input type="radio" name="option" value="None" id="None_option">None
<input type="submit" name="submit" id="submit" onclick="changeFormula()">
<img src="formula_gdp.gif" name="formula" id="formula">
<script type="text/javascript">
function changeFormula() {
var radio = document.getElementsByName('option');
var formula = document.getElementById('formula')
if (radio[0].checked) {
formula.src = "formula_gdp.gif";
alert(formula.src);
}
if (radio[1].checked) {
formula.src = "formula_pop.gif";
alert(formula.src);
}
if (radio[2].checked) {
formula.src = "formula_none.gif";
alert(formula.src);
}
}
</script>
有兩項更改要求:
1)將var formula = document.getElementsByName('formula')
更改為var formula = document.getElementById('formula');
2)radio的索引以0
開頭而不是1
,因此radio[1]
, radio[2]
, radio[3]
應該是radio[0]
, radio[1]
, radio[2]
希望能有所幫助。
將“提交”更改為按鈕以阻止重新加載頁面
<input type="button" value ="Click Me" name="submit" id="submit" onclick="changeFormula()" />
並將其用於您的功能
function changeFormula(){
var formula = document.getElementById('formula')
if(document.getElementById('GDP_option').checked)
formula.src = "formula_gdp.gif";
if(document.getElementById('Population_option').checked)
formula.src = "formula_gdp.gif";
if(document.getElementById('None_option').checked)
formula.src = "formula_none.gif";
}
工作提琴: http : //jsfiddle.net/UB2ka/沒有圖像,但是您可以在螢火蟲中看到src的變化
我認為人們喜歡jquery,但我需要輕巧的東西。
這里是:
<script>
function changeImage(imgName)
{
image = document.getElementById('theimage');
image.src = imgName;
}
</script>
這是html的單選按鈕(出於隱私目的略有修改)
<input type="radio" name="reader" value="reader1" onClick="changeImage('image0.jpg');">
<br>
<input type="radio" name="reader" value="reader1" onClick="changeImage('image1.jpg');">
<br>
<input type="radio" name="reader" value="reader1" onClick="changeImage('image2.jpg');">
這是圖片:
<img src="image0.jpg" name="theimage" id="theimage">
這對我有用。 單擊單選按鈕,圖像更改。
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