$()JS tips_javascript tips

When we write JavaScript, we will definitely use the document.getElementById() method frequently. It is easy to make mistakes in such a long string, and getElementById is case-sensitive.
In fact, one method advocated in prototype.js is to use the $() abbreviation. Through the following function, you can use $('id') to implement the document.getElementById('id') function. How about it? Have fun!

Copy code The code is as follows:

function $() 
{ 
var elements = new Array();
for (var i = 0; i < arguments.length; i )
{
var elements = arguments[i];
if (typeof element == 'string')
element = document.getElementById(element);
if (arguments.length == 1)
return element;
elements.push(element);
}
return elements;
}

And what’s even better about this function is that if you want it to submit an array with multiple IDs, it will also return multiple Array of elements!