# Symbol instructions in the URL address _ javascript skills

The following describes the use of #, because multiple # numbers in the url indicate different meanings and differences. Generally, we want a tag a to click and execute javascript code, which can be written in the following ways:
Method 1: Click 1
The disadvantage of this method is that after clicking it, # is added to the URL of the address bar and the page is moved to the top. It is generally not recommended.
Method 2: Click 1
This method avoids the disadvantage of method 1. Clicking this method does not affect the page. However, there is a fatal drawback: in IE6, the submit () method of the form object cannot be executed, nor jump statements can be executed, such
Click 1
Click 1
In IE6, it will be invalid. If it is changed to href = "#", it can be executed normally in IE6.

Method 3: Click 1
After clicking the button, three # numbers are added to the URL in the address bar, but the scroll bar is not affected. In IE6, the submit () method and jump statement of the form object can also be executed, is a relatively discounted method.

Conclusion: I personally think that if the javascript method to be executed needs to submit a form, jump to the page, use method 3, and use method 2 in other cases.

In addition, this introduces another problem. Generally, the following javascript code is used to reload the current page:
Window. location. href = window. location. href;
But when the URL address contains #, the above Code is invalid, so you need to use the following code:
Window. location. href = window. location. href. split ('#') [0];
Split the URL address with the # symbol and take the first part.

In many cases/index.htm # desc, the following desc may be a parameter. It is not easy for parameters to display different content. Instead, it is not a simple anchor, but ajax reads the content.