在没有onclick的情况下运行Javascript函数
[英]Run Javascript function without onclick
问题描述
I have a Javascript function for creating new form elements on a web page. 
我有一个Javascript函数，用于在网页上创建新的表单元素。 The function is called by an onclick event. 该函数由onclick事件调用。
I can't figure out how to run the function without the onclick event. 没有onclick事件，我无法弄清楚如何运行该函数。 I need to do this as I have Python code generating content to prepopulate the form elements, but still wish to be able add and remove the form elements dynamically with the Javascript. 我需要这样做，因为我有Python代码生成的内容来预填充表单元素，但仍然希望能够使用Javascript动态添加和删除表单元素。
Javascript function: JavaScript函数：
pcount = 0;
createinputprice =function (){
field_area = document.getElementById('pricetable');
var tr = document.createElement("tr");
var cella = document.createElement("td");
var cellb = document.createElement("td");
var input = document.createElement("input");
var input2 = document.createElement("input");
input.id = 'descprice'+pcount;
input2.id = 'actprice'+pcount;
input.name = 'descprice'+pcount;
input2.name = 'actprice'+pcount;
input.type = "text";
input2.type = "text";
cella.appendChild(input);
cellb.appendChild(input2);
tr.appendChild(cella);
tr.appendChild(cellb);
field_area.appendChild(tr);
//create the removal link
var removalLink = document.createElement('a');
removalLink.onclick = function(){
this.parentNode.parentNode.removeChild(this.parentNode)
}
var removalText = document.createTextNode('Remove Field');
removalLink.appendChild(removalText);
tr.appendChild(removalLink);
pcount++
}
HTML: HTML：
<table id="pricetable">
</table>
<a href='#' onclick="createinputprice()">Add Price</a>
<script type="text/javascript">
createinputprice();
</script>
The onclick event works fine in JSFiddle but calling the function directly doesn't work at all. onclick事件在JSFiddle中可以正常工作，但是直接调用该函数根本不起作用。
3 个解决方案
解决方案1
4 2013-09-26 13:40:36
you can put it into tag using 'onload' event: 您可以使用“ onload”事件将其放入标签中：
<body onload='yourfunction()'>
or just use jQuery: 或者只是使用jQuery：
$(document).ready(function() {
yourFunc();
});
解决方案2
0 2013-09-26 13:43:14
I suppose you could use <body onload="yourfunction()"> you also should look into http://www.w3schools.com/js/js_htmldom_events.asp . 我想您可以使用<body onload="yourfunction()">您还应该查看http://www.w3schools.com/js/js_htmldom_events.asp 。
As you can see there are quite a few events available in javascript one should allways pick the right tool(event) for doing the work. 如您所见，javascript中有很多可用的事件，应该始终选择正确的工具（事件）来完成工作。
解决方案3
0 2013-09-26 13:43:21
If you want to call jquery function on Page load: you can use $(document).ready(function(){}); 如果要在页面加载时调用jquery函数：可以使用$(document).ready(function(){});
For example: 例如：
Jquery- Jquery-
<script type="text/javascript">
$(document).ready(function(){
createinputprice();
});
</script>
and you can also fire the click event in Jquery: 您还可以在Jquery中触发click事件：
HTML- HTML的
<a id="myLink" href='#' onclick="createinputprice();">Add Price</a>
Jquery- Jquery-
<script type="text/javascript">
$(document).ready(function(){
$('#myLink').click();
});
</script>
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