JS controls Input

1. 1. Converts lowercase letters to uppercase letters:
2. <Input type = "text" name = "xianjin" class = "input02" style = "text-transform: uppercase;">
3. Or
4. <Input type = "text" name = "xianjin" onkeyup = "This. value = This. value. tolocaleuppercase ()">
5. 2. Convert uppercase letters to lowercase letters automatically.
6. <Input type = "text" name = "xianjin" class = "input02" style = "text-transform: lowercase;">
7. Or
8. <Input type = "text" name = "xianjin" onkeyup = "This. value = This. value. tolocalelowercase ()">
9. 3. Prevent text files from being cleared.
10. <Input style = behavior: URL (# default # savehistory); type = text id = opersistinput>
13. 4. Press enter to move the cursor to the next input box.
14. <Input onkeydown = "If (event. keycode = 13) event. keycode = 9">
15. 5. It can only be Chinese (with flashing)
16. <Input onkeyup = "value = value. Replace (/[-~] /G, '')" onkeydown = "If (event. keycode = 13) event. keycode = 9">
17. 6. It can only be numbers (with flashing)
18. <Input onkeyup = "value = value. replace (/[^ \ D]/g, '')" onbeforepaste = "clipboardData. setdata ('text', clipboardData. getdata ('text '). replace (/[^ \ D]/g, '')">
19. 7. Only numbers are allowed (no flashing)
20. <Input style = "ime-mode: Disabled" onkeydown = "If (event. keycode = 13) event. keycode = 9 "onkeypress =" If (event. keycode <48 | event. keycode> 57) event. returnvalue = false ">
21. Or
22. Onkeyup = "If (isnan (value) {alert ('must be number'); value = '';}"
23. 8. Only English and numbers can be entered (with flashing)
24. <Input onkeyup = "value = value. replace (/[\ W]/g, '')" onbeforepaste = "clipboardData. setdata ('text', clipboardData. getdata ('text '). replace (/[^ \ D]/g, '')">
25. 9. shielded Input Method
26. <Input type = "text" name = "url" style = "ime-mode: Disabled" onkeydown = "If (event. keycode = 13) event. keycode = 9">
30. 10. You can only enter numbers, decimal points, minus (-) characters (no flashing)
31. <Input onkeypress = "If (event. keycode! = 46 & event. keycode! = 45 & (event. keycode <48 | event. keycode> 57) event. returnvalue = false ">
32. 11. Change the font size of the input box. The font of the button remains unchanged.
33. <Input name = "startdate" type = "text" style = "font-family: Arial; color: #008000; font-size: 27px" size = "10">
34. 12. Up to 255 characters can be entered
35. <Textarea name = "TXT" rows = "7" id = "TXT" onkeypress = "xz ()"> </textarea>
39. <Script language = "JavaScript">
40. Function xz ()
41. {
42. If (txt. value. length> 255)
43. Event. keycode = 0;
44. TXT. value = TXT. value. substr (0,255 );
45. }
46. </SCRIPT>
48. Commonly used methods to limit input
49. 1. When the cancel button is pressed, add the value hidefocus or hidefocus = true to the input.
50. Input type = submit value = submit hidefocus = true
53. 2. Read-only text box content, add the attribute value readonly in input
54. Input type = text readonly
57. 3. Prevent text files from being cleared (style content can be referenced as a class)
58. Input type = text style = behaviorurl (# default # savehistory );
61. 4. Press enter to move the cursor to the next input box.
62. Input type = text onkeydown = If (event. keycode = 13) event. keycode = 9
63. 5. It can only be Chinese (with flashing)
64. Input type = text onkeyup = value. Replace ([-~] G, '') onkeydown = If (event. keycode = 13) event. keycode = 9
67. 6. Only numbers are allowed (with flashing)
68. Input type = text onkeyup = value. replace ([^ d] G, '') onbeforepaste = clipboardData. setdata ('text', clipboardData. getdata ('text '). replace ([^ d] G ,''))
72. 7. Only numbers are allowed (no flashing)
73. Input type = text style = ime-modedisabled onkeydown = If (event. keycode = 13) event. keycode = 9 onkeypress = If (event. keycode48 event. keycode57) event. returnvalue = false
77. 8. Only English and numbers can be entered (with flashing)
78. Input type = text onkeyup = value. replace ([w] G, '') onbeforepaste = clipboardData. setdata ('text', clipboardData. getdata ('text '). replace ([^ d] G ,''))
81. 9. shielded Input Method
82. Input type = text name = URL style = ime-modedisabled onkeydown = If (event. keycode = 13) event. keycode = 9
85. 10. You can only enter numbers, decimal points, minus (-) characters (no flashing)
86. Input onkeypress = If (event. keycode! = 46 & event. keycode! = 45 & (event. keycode48 event. keycode57) event. returnvalue = false
87. 11. Only two decimal places can be entered, and three decimal places (with flashing)
88. Input type = text maxlength = 9 onkeyup = If (value. match (^ d {3} $) value = value. replace (value, parseint (value10); value = value. replace (. d. G ,'. ') onkeypress = If (event. keycode48 event. keycode57) & event. keycode! = 46 & event. keycode! = 45 value. Match (^ d {3} $). d {3} $. Test (value) {event. returnvalue = false}