Some minor problems encountered when writing js_javascript skills

1. When writing the OnClientClick event of , you need to add return; otherwise, OnClientClick will return false, but the OnClick event will still be executed.
For example:

Copy code The code is as follows:

2. When opening a new window using window.showModalDialog(), if it contains a js editor or other third-party editor, you will not be able to edit it, and you will not even be able to select it;
So far I have not If you find a better solution, try switching to window.open() method.
3. Checkbox all selection questions:
html:

Copy code The code is as follows:

Select all

js:

Copy code The code is as follows:

function selectAll()
{
var obj = document.getElementById("chkAll");
var ckblist = document.getElementById("ckblist" );
var chk = ckblist.getElementsByTagName("input");
if(obj.checked)
{ 🎜>　{
　{ 🎜>

Copy code


The code is as follows:

①
//js gets the Table and changes its style






< tr>

Cell 1		Cell 2
Cell 3	Cell 4	Cell 5

②
//The timed loop in js calls the function setInterval (infinite bomb) and the corresponding stop function
var timer //First, declare a variable to store setInterval and return

value.
timer=setInterval("alert('123')",500); //Use declared variables to store the value returned by setInterval.
clearInterval(timer); //Clear setInterval Function
If you really want to call parameters in the setInterval method, and the function needs to pass parameters, you can do it in the following way: declare the value to be passed as a global variable, and then

do it in the method Call. For example:



③
//js gets the URL of this page
var Url = window.location.href;

④
//js control to save this page
document.execCommand("SaveAs","","C:\index.htm") ; //1. The name of the operation to be performed, 2. The default save address, file name and file type
function save(dizhi){
document.execCommand("SaveAs","",dizhi);
}

⑤
//Open, save as, attribute, print" and other 14 JS codes
■Open■


■Save as■

■Properties■

■Print■

■Page Settings■

■Refresh■

■Import favorites■

■Export Favorites■

■Add to Favorites■

Folder>
■Organize Favorites■

■View original file■

■Language Settings■

■Forward■

■Back■


⑥
//Change CSS style
1. Partially change the style (case sensitive)
Change className (no need to add style)
document. getElementById('t2').className=”…”
Change classText (must add style)
document.getElementById(’t2’).style.cssText=”…”
Change the CSS of the control directly Style
document.getElementById('t2').style.backgroundColor=”#003366″
2. Globally change the style (skin change)
Add an id to the currently used CSS style and change the skin When changing the path of the referenced CSS style, for example:

< span on click="javascript:document.getElementById('css').href = 'ie.css'">Click me to change the style

⑦
//Generate random numbers , the parameters are (minimum value, maximum value)
function GetRnd(min,max){
return parseInt(Math.random()*(max-min 1));
}

⑧
//Convert strings to numbers in js
parseInt("123"); //123