Javascript code _ javascript skills that are commonly used to restrict input

Js Code that is commonly used to restrict input

1. when the cancel button is pressed, add the value hideFocus or HideFocus = true <input type = "submit" value = "submit" hidefocus = "true"/> 2 to the input box. read-only text box content, add the attribute value readonly in input <input type = "text" readonly/> 3. prevent TEXT files from being cleared (style content can be referenced as a class) <input type = "text" style = "behavior: url (# default # savehistory ); "/> 4. the ENTER key allows the cursor to move to the next input box <input type = "text" onkeydown = "if (event. keyCode = 13) event. keyCode = 9 "/> 5. only Chinese (with flashing) <input type = "text" onkeyup = "Value = value. replace (/[-~] /G, '')" onkeydown = "if (event. keyCode = 13) event. keyCode = 9 "/> 6. only numbers (with flashing) <input type = "text" onkeyup = "value = value. replace (/[^ \ d]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ d]/g, '')"/> 7. it can only be a number (no flashing) <input type = "text" style = "ime-mode: disabled" onkeydown = "if (event. keyCode = 13) event. keyCode = 9 "onkeypress =" if (event. keyCode <48 | event. keyCode> 57) ev Ent. returnValue = false "/> 8. only English and numbers (with flashing) can be entered. <input type = "text" onkeyup = "value = value. replace (/[\ W]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ d]/g, '')"/> 9. blocked input Method <input type = "text" name = "url" style = "ime-mode: disabled" onkeydown = "if (event. keyCode = 13) event. keyCode = 9 "/> 10. only numbers, decimal points, minus (-) characters (no flashing) <input onkeypress = "if (event. keyCode! = 46 & event. keyCode! = 45 & (event. keyCode <48 | event. keyCode> 57) event. returnValue = false "/> 11. only two decimal places can be entered, and three decimal places (with flashing) <input type = "text" maxlength = "9" onkeyup = "if (value. match (/^ \ d {3} $/) value = value. replace (value, parseInt (value/10); value = value. replace (/\. \ d *\. /g ,'. ') "onkeypress =" if (event. keyCode <48 | event. keyCode> 57) & event. keyCode! = 46 & event. keyCode! = 45 | value. match (/^ \ d {3 }$/) | /\. \ d {3} $ /. test (value) {event. returnValue = false} "/>
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