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[英]how can I add values into an array without erasing previous values in array using javascript?
[英]How can I delete the previous values and add new values from Json with javascript?
我有这个html代码部分
<div id="prt">
<select name="selectPrt" class="span12" onchange="sta_callPRT();">
<option value="noPrt">Choose one vehicle.</option>
<option value="prt1">PRT 1</option>
<option value="prt2">PRT 2</option>
<option value="prt3">PRT 3</option>
<option value="prt4">PRT 4</option>
<option value="prt5">PRT 5</option>
</select>
<div class="row-fluid">
<div class="span6">
<div class="section">
<div class="sectionTitle">
<h3>Vehicle Info</h3>
</div>
</div>
<div id="state"><strong>State:</strong> </div>
<div id="freeSeats"><strong>freeSeats:</strong></div>
<div id="battery"><strong>battery:</strong></div>
<div id="totalDistance"><strong>totalDistance:</strong></div>
<div id="location"><strong>Location:</strong></div>
<div id="estimatedTime"><strong>estimatedTime"</strong></div>
<div id="estimatedDistance"><strong>estimatedDistance:</strong></div>
<div id="speed"><strong>speed:</strong></div>
而这个Javascript
function sta_callPRT(){
$.getJSON('PRTInfoGenerator.php', function(json){
$.each(json, function(key, value) {
if(key=="state") {
//$('#state').empty();
//document.getElementById("parameters").appendChild(divTag);
$('#state').append(value);
}
if(key=="freeSeats") {
$('#freeSeats').append(value);
}
if(key=="estimatedDistance"){
$('#estimatedDistance').append(value);
}
if(key=="estimatedTime"){
$('#estimatedTime').append(value);
}
if(key=="battery"){
$('#battery').append(value);
}
if(key=="speed"){
$('#speed').append(value);
}
if(key=="location"){
$.each(json.location, function(par_key, par_value) {
$('#location').append(par_key+': '+par_value+' ');
});
}
if(key=="totalDistance"){
$('#totalDistance').append(value);
}
});
});
}
我想用html随机编写车辆值。我也有php代码来产生车辆的随机值。当我选择车辆时,它会显示一些值,但是在第二个选择中,新值会添加到第一个的末尾。在做出新选择时,如何删除先前的值并添加新的值? 例如,这是网页中的第一选择;
State: Running
freeSeats:0
battery:95
totalDistance:8541
Location:x: -5 y: 34
estimatedTime:15
estimetedDistance:809
Speed:18
这是第二;
State: RunningRunning
freeSeats:04
battery:9540
totalDistance:85411848
Location:x: -5 y: 34 x: 84 y: -70
estimatedTime:15269
estimetedDistance:809513
Speed:1818
将前缀文本移到div之外,例如freeseats: <div id="freeSeats"></div>
并使用$('#freeSeats').text(value)
代替$('#freeSeats').append(value);
附加将附加已经存在的内容,但文本将代替该值。
更改强标记中的文本,尽管您想使用$('#freeSeats strong')
但我建议不要使用强标记,而应在div / div上使用style属性。
这是您的更新代码,然后:
<div id="prt">
<select name="selectPrt" class="span12" onchange="sta_callPRT();">
<option value="noPrt">Choose one vehicle.</option>
<option value="prt1">PRT 1</option>
<option value="prt2">PRT 2</option>
<option value="prt3">PRT 3</option>
<option value="prt4">PRT 4</option>
<option value="prt5">PRT 5</option>
</select>
<div class="row-fluid">
<div class="span6">
<div class="section">
<div class="sectionTitle">
<h3>Vehicle Info</h3>
</div>
</div>
State:<div id="state"></div>
freeSeats:<div id="freeSeats"></div>
battery:<div id="battery"></div>
totalDistance:<div id="totalDistance"></div>
Location:<div id="location"></div>
estimatedTime"<div id="estimatedTime"></div>
estimatedDistance:<div id="estimatedDistance"></div>
speed:<div id="speed"></div>
和脚本:
function sta_callPRT(){
$.getJSON('PRTInfoGenerator.php', function(json){
$.each(json, function(key, value) {
if(key=="state") {
$('#state').text(value);
}
if(key=="freeSeats") {
$('#freeSeats').text(value);
}
if(key=="estimatedDistance"){
$('#estimatedDistance').text(value);
}
if(key=="estimatedTime"){
$('#estimatedTime').text(value);
}
if(key=="battery"){
$('#battery').text(value);
}
if(key=="speed"){
$('#speed').text(value);
}
if(key=="location"){
$.each(json.location, function(par_key, par_value) {
$('#location').text(par_key+': '+par_value+' ');
});
}
if(key=="totalDistance"){
$('#totalDistance').text(value);
}
});
`
每次清除div ...
function sta_callPRT(){
$('#state, #freeSeats, #battery').empty();
$.getJSON('PRTInfoGenerator.php', function(json){
...
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