11, web-making Dreamweaver (add: JS fragmented knowledge points && regular expressions)

JS Knowledge Point

the difference between the carriage return/R and the newline character/n:/R equals Enter, which is the difference between a paragraph and a paragraph.

/n is equivalent to Shift+enter, which is the distance between rows and rows, smaller than

Several window operation methods:

1. Get the current window size and print:

var height=window.innerheight; var width = window.innerwidth;document.write ("<br/>" + "height" +height+ "," + "width" +width);

2. Open the window, close the current window

window.open ("http://baidu.com"); Window.close ();

3. Move the current window to a location (x, y)

Window.moveto (200,200);

4. Change the size of the current window (width,height)

Window.resizeto (1100,1100);

5. Get the current page address

document.write (location. href);

6, "History" page forward (forward to the previous history, equivalent to "→"), back (back to the previous history, equivalent to "←")

<!-- use the. Back method setting in another Web page  - <  type= "button"  onClick= "A ()"= "point me forward"/>

function A ()    {        window.history.forward (); /* forward to the previous history */     }

*navigator Visitor's browser information

Alert: Warning Box confirm: Confirmation box prompt: Prompt box

Regular expression regexp:

Methods for establishing regular expressions:

var New REGEXP (/^[0-9]{17}[0-9| x]$/); /* REGEXP () The expressions inside the parentheses need to be defined by themselves: 1, [] There is only one element 2, () inside can write a word or expression 3, {} inside the number
4. ^: start with an element and write it in front of the element
5, $: End With an element, written behind the element * /

Cases:

1. Regular Expression Authentication ID:

  ID:  <  input  type  = "text"   ID   = "1"  />  

/* JavaScript Section */  var a= document.getElementById ("1"). Value;   var New REGEXP (/^[0-9]{17}[0-9| x]$/);   if (Patten.test (a))  {      alert ("enter correct");  }   Else   {      alert ("input error");  }

2. Regular Expression Verification mailbox:

 mailbox: <  input  type  = "text"   ID  = "2"  />  <  input  type  = "button"   value  = "Commit"   onclick  = "Mail ()"  /> 
  

function Mail () {    varnew RegExp (/^[0-9| a-z|_]{1,17}[@][0-9| a-z]{1,3}. (COM) $/)    var mail = document.getElementById ("2"). Value;     if (patten2.test (mail))      {          alert ("enter correct");      }     Else       {          alert ("input error");}      }

11, web-making Dreamweaver (add: JS fragmented knowledge points && regular expressions)