以下代码需要JavaScript解释！！！ [英] JavaScript Explanation Required for the Following Code !!!

问题描述

亲爱的朋友，
我在我的朋友的一个Example中找到了这个JavaScript函数.
有人可以详细说明这个功能吗?

Dear Friends,
I found this JavaScript function on a Example of my friend.
Can someone plz explain me this function in details ?

function callPrint(elementId) {
                var prtContent = document.getElementById(elementId);
                var WinPrint = window.open('', '', 'left=0,top=0,width=1000,height=600,toolbar=2,scrollbars=2,status=0');
                var docColor = "Black";
                var strInnerHTML = prtContent.innerHTML;
                var strModifiedInnerHTMl = strInnerHTML.replace(/white/g, docColor);
                WinPrint.document.write(strModifiedInnerHTMl);
                WinPrint.document.close();
                WinPrint.focus();
                WinPrint.print();
                WinPrint.close();
            }   

我需要从第三行开始的解释.

感谢您的帮助.

I need Explanation from 3rd line Onward.

Thanks For Helping.

推荐答案

var docColor = "Black"

创建一个名为docColor的变量并将其值设置为字符串"Black"

Create a variable named docColor and set its value to the string "Black"

var strInnerHTML = prtContent.innerHTML;

创建一个名为strInnerHTML的变量，并将其值设置为prtContent页面元素的innerHTML值.

Create a variable named strInnerHTML and set its value to the innerHTML value of the prtContent page element.

var strModifiedInnerHTMl = strInnerHTML.replace(/white/g, docColor);

创建一个名为strModifiedInnerHTML的变量，并将其值设置为strInnerHTML的修改后的副本，在该副本中，"white"的所有实例均已替换为docColor(当前为"Black")的当前值.这是通过带有g开关的正则表达式/white/完成的，该开关表示它将更新找到的所有实例.

Create a variable named strModifiedInnerHTML and set its value to a modified copy of strInnerHTML where any instances of "white" have been replaced by the current value of docColor(Which is currently "Black"). This is being done with a regular expression /white/ with a g switch indicating that it will update all instances that it finds.

WinPrint.document.write(strModifiedInnerHTMl);

将strModifiedInnerHTML字符串写入WinPrint文档对象.

Writes the strModifiedInnerHTML string to a WinPrint document object.

WinPrint.document.close();

关闭WinPrint文档

Closes the WinPrint document

WinPrint.focus();

赋予WinPrint对象焦点

Gives the WinPrint object focus

WinPrint.print();

将Winprint对象发送到打印机

Sends the Winprint object to the printer

WinPrint.close();

关闭/完成WinPrint对象.很有可能需要执行此调用来清理WinPrint对象执行其操作所需的资源.

Closes/Finished the WinPrint object. More than likely this call is required to clean up resources that the WinPrint object required to perform its actions.

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