变量作为JavaScript中的按钮值

Question

I will be reading a tag from xml and assign it to a variable, ID .

ID=(x[i].getElementsByTagName("ID-NUM")[0].childNodes[0].nodeValue);

How could I use the variable, ID , as the button value to display?

document.write("<input type = button value = ID style='width:100'><br><br>");

Kindly let me know if I an not clear, thanks.

Answer 1

您需要将该变量放入要写出的字符串中

document.write("<input type='button' value='" + ID + "' style='width:100%'/><br/><br/>");

Answer 2

另外，如果您已经写出了按钮对象，则可以直接使用对象模型：

document.getElementById("idOfButtonObject").value = ID;

Answer 3

document.write("<input type='button' value='" + ID + "' style='width:100;' />

Answer 4

Don't use document.write to insert anything on the page. It's problematic because if you do it after the object model has been constructed, it will wipe out the entire document and create a new one. Instead use the DOM methods to create a button.

var input = document.createElement('input');
input.type = 'button';
input.value = ID; // set the ID
input.style = 'width: 100';
document.body.appendChild(input); // add to page