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Development Summary (2)-Javascript

Source: Internet
Author: User
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This article is a summary of some of the Javascript I have encountered in my daily work, mainly for the use of scripts in Asp.net.
1. textbox verification (this is actually a regular content)

<! -- Use a regular expression to restrict Chinese characters only --> <input type = "text" onkeyup = "value = value. replace (/[^ \ u4e00-\ u9fa5]/g, '')" onbeforepaste = "clipboardData. setdata ('text', clipboardData. getdata ('text '). replace (/[^ \ u4e00-\ u9fa5]/g, '')"/> <! -- Use a regular expression to limit that only numbers can be entered --> <input type = "text" onkeyup = "value = value. replace ([^ \ D]/g, '')" onbeforepaste = "clipboardData. 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 = "clipboardData. 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, '')" onbeforepaste = "clipboardData. setdata ('text', clipboardData. getdata ('text '). replace (/[^ \ d | ^ \.] /g, '')"> <SCRIPT type = "text/JavaScript"> // remove space function trim (STR) {return Str. replace (/(^ \ s *) | (\ s * $)/g ,"");} // The onbeforepaste attribute prevents copy and paste. // 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) ;}</SCRIPT>

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 <inputs. length; I ++) {If (inputs [I]. type = "checkbox" & inputs [I]. checked = true) {status = false;} return status ;}

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 length of the string


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


Updating ......

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