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Summary of Javascript development knowledge

Source: Internet
Author: User
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1. TextBox verification is actually a regular content) 

<! -- Use a regular expression to restrict Chinese characters only --> <input type = "text" onkeyup = "value = value. replace (/[^ \ u4E00-\ u9FA5]/g, '')" onbeforepa
Ste = "clipboardData. setData ('text', clipboardData. getData ('text'). replace (/[^ \ u4E00-\ u9F
A5]/g, '')"/>
<! -- Use a regular expression to limit that only numbers can be entered --> <input type = "text" onkeyup = "value = value. replace ([^ \ d]/g, '')" onbeforepaste = "clipboar
DData. setData ('text', clipboardData. getData ('text'). replace (/[^ \ d]/g, '')"/>
<! -- Use a regular expression to limit that only numbers and English characters can be entered --> <input type = "text" onkeyup = "value = value. replace ([\ W]/g, '')" onbeforepaste = "clipboar
DData. setData ('text', clipboardData. getData ('text'). replace (/[^ \ d]/g, '')"/>
<! -- Certificate number and small data point --> <input type = "text" ID = "Text1" onkeyup = "value = value. replace (/[^ \ d | ^ \.] /g, '')" o
Nbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text'). replace (/[^ \ d |
^ \.] /G, '')"> // remove space function trim (str) {return str. replace (/(^ \ s *) | (\ s * $)/g ,"");}

The onbeforepaste attribute prevents copying and pasting.

//validate emailfunction IsMail(mail) {     var patrn = /^w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*$/;     return patrn.test(mail);}//validate urlfunction IsURL(url){     var regexp = /^http://[A-Za-z0-9]+.[A-Za-z0-9]+[/=?%-&_~`@[]':+!]*([^<>""])*$/;     return regexp.test(url);}

2. Check whether CheckBoxList is selected.

// Id is the ID of the CheckBoxList control. // return true indicates that function checkLocCate (id) {var status = true; var inputs = document is not selected. getElementById (id ). getElementsByTagName ("input"); for (var I = 0; I

3. Add items for DropDownList

// Id is the IDfunction addOptions (id) {var ddl = document. getElementById (id); // clears the content of the DropDownList ddl. options. length = 0; for (var I = 0; I <10; I ++) {// Options the first parameter is the Text Value, and the second parameter is the Value ddl. add (new Option (I, I ));}}

4. Add rows and columns to the table

Adding rows and columns in javascript is implemented through insertRow and inertCell. See the following example.

<Html xmlns = "http://www.w3.org/1999/xhtml"> 



5. Differences between setTimeOut and setInterval in javascript


 

 
   
   
 
    
// Execute the handler function 1window. setInterval ("function 1", 1000) in one second; // delay 1 second to execute function 2window. setTiemout ("function 2", 1000 );
 
   
 
  

 


6. js get the string length


 

 
   
   
 
    
var str= str.replace(/[^\x00-\xff]/g, "**").length;
 
   
 
  

 


 
    
 
  
  1. Javascript object-oriented basics and implementation of interfaces and inheritance classes
    2. 
 
  
  2. Update UpdatePanel using JavaScript
    3. 
 
  
  3. Two common methods for defining classes in JavaScript
    4.

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