JS control what the text box enters

Word:

Enter in ' <input> ' first

Onkeyup= "Value=value.replace (/[^\x]/g, ')"

Then the X in (/[\x]/g, ") is replaced with the code you want to enter,

Chinese u4e00-u9fa5, number 0-9, English a-z\a-z, other symbols @, dots, or other symbols.

can also be multiple, with \ Separated on the line.
For example: Chinese and English + digit + @ sign + dot symbol \a-\z\a-\z0-9\u4e00-\u9fa5\@\.

If you want to not right-click the popup menu in the text box and cannot paste in the copied information

Enter onpaste= "return false" oncontextmenu= "return false" in ' <input> '. "

' S control text box can only enter numbers
<input onkeyup= "Value=value.replace (/[^0-9]/g, ')" onpaste= "Value=value.replace (/[^0-9]/g, ')" OnContextMenu = " Value=value.replace (/[^0-9]/g, ') ">

JS control text box can only enter a number, a decimal point
<input onkeyup= "Value=value.replace (/[^\0-9\.) /g, "onpaste=" Value=value.replace (/[^\0-9\.) /g, ') "OnContextMenu =" value=value.replace (/[^\0-9\.) /g, ') ' >

JS control text box can only be entered in English
<input onkeyup= "Value=value.replace (/[^\a-\z\a-\z]/g, ')" onpaste= "Value=value.replace (/[^\a-\z\A-\Z]/g, ')" OnContextMenu = "Value=value.replace (/[^\a-\z\a-\z]/g, ')" >

JS control text box can only input English, digital
<input onkeyup= "Value=value.replace (/[^\a-\z\a-\z0-9]/g, ')" onpaste= "Value=value.replace (/[^\a-\z\A-\Z0-9]/g , ') "OnContextMenu =" value=value.replace (/[^\a-\z\a-\z0-9]/g, ') ">

JS control text box can only input Chinese
<input onkeyup= "Value=value.replace (/[^\u4e00-\u9fa5]/g, ')" onpaste= "Value=value.replace (/[^\u4E00-\u9FA5]/g , ') "OnContextMenu =" value=value.replace (/[^\u4e00-\u9fa5]/g, ') ">

JS control text box can only input Chinese, English, digital
<input onkeyup= "Value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5]/g, ')" onpaste= "Value=value.replace (/[^\a- \z\a-\z0-9\u4e00-\u9fa5]/g, ') "OnContextMenu =" value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5]/g, ') ">

JS control text box can only input Chinese, English, numbers, spaces
<input onkeyup= "Value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5\]/g, ')" onpaste= "Value=value.replace (/[^\ A-\z\a-\z0-9\u4e00-\u9fa5\]/g, ') "OnContextMenu =" Value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5\]/g, ') " >

JS control text box can only input Chinese, English, digits, decimal point
<input onkeyup= "Value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5\.) /g, "onpaste=" Value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5\.) /g, ') "OnContextMenu =" value=value.replace (/[^\a-\z\a-\z0-9\u4e00-\u9fa5\.) /g, ') ' >

JS control what the text box enters