How to tell the text box in JavaScript can only output English letters, Chinese characters and numbers, cannot enter special characters!

Js-can only be entered in Chinese and English
2008-11-08 10:17
Using the regular Expression object (REGEXP) in JS to judge
Chinese
^[\u0391-\uffe5]+$
English
^[a-za-z]+$
Chinese and English
/^[\u0391-\uffe5a-za-z]+$/

JS Regular expression limit text box can only enter numbers, decimal points, English letters, Chinese characters and other types of code

1. Text box can only enter a numeric code (the decimal point can not be entered)
<input onkeyup= "This.value=this.value.replace (/\d/g, ')" onafterpaste= "This.value=this.value.replace (/\D/g, ' ) ">
2. Only the number can be entered and the decimal point will be lost.
<input onkeyup= "if (IsNaN (value)) ExecCommand (' Undo ')" Onafterpaste= "if (IsNaN (value)) ExecCommand (' Undo ')" >
<input name=txt1 onchange= "if (/\d/.test (this.value)) {alert (' Input number only '); this.value= ';}" >
3. Number and decimal method two
<input type=text tvalue= "" ovalue= "" onkeypress= "if (!this.value.match.? \d*?$/)) This.value=this.t_value;else this.tvalue=this.value;if (This.value.match (?: [/^ (?: \. \d+)?)? $/)) This.ovalue=this.value "onkeyup=" if (!this.value.match (/^[\+\-]?\d*?\.? \d*?$/)) This.value=this.t_value;else this.tvalue=this.value;if (This.value.match (?: [/^ (?: \. \d+)?)? $/)) This.ovalue=this.value "onblur=" if (!this.value.match (?: [/^ (?: \). \d+)? | \.\d*?)? $/) this.value=this.o_value;else{if (This.value.match (/^\.\d+$/)) this.value=0+this.value;if (This.value.match (/^ \.$/)) This.value=0;this.ovalue=this.value} ">
4. Only letters and kanji can be entered
<input onkeyup= "Value=value.replace (/[\d]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[\d]/g, ') "maxlength=10 name=" Numbers ">
5. Only English letters and numbers can be entered, not Chinese
<input onkeyup= "Value=value.replace (/[^\w\.\/]/ig, ')" >
6. Only enter numbers and English <font color= "Red" >chun</font>
<input onkeyup= "Value=value.replace (/[^\d|chun]/g, ')" >
7. Only a maximum of two digits after the decimal point (numeric, Chinese can be entered), can not enter letters and operation symbols:
<input onkeypress= "if ((event.keycode<48 | | event.keycode>57) && event.keycode!=46 | |/\.\d\d$/.test ( Value)) Event.returnvalue=false ">
8. Only a maximum of two digits after the decimal point (numbers, letters, Chinese can be entered), you can enter the operation symbol:
<input onkeyup= "This.value=this.value.replace (/^ (\-) * (\d+) \. ( \d\d). *$/, ' $1$2.$3 ') ">
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Only Chinese characters can be entered:
<input onkeyup= "Value=value.replace (/[^\u4e00-\u9fa5]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\u4e00-\u9fa5]/g, ')) ">
Only numbers can be entered:
<input onkeyup= "Value=value.replace (/[^\d]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ')) ">

Only English and numbers can be entered:
<input onkeyup= "Value=value.replace (/[\w]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ')) ">
Control input Box can only enter text or numbers, or you can not allow special characters to be entered
The following characters are not allowed here: (like [email protected]#$%^&*, etc.) <br>
<textarea rows=2 cols=20 name=comments onkeypress= "if ((Event.keycode > && event.keycode < 48) | | (Event.keycode > && event.keycode < 65) | | (Event.keycode > && event.keycode < 97)) Event.returnvalue = false; " >
Only whitespace input is forbidden
Onkeyup= "Value=value.replace (/\s/g, ')"
Only Chinese and English can be entered:
Onkeyup= "Value=value.replace (/[^\a-za-z\u4e00-\u9fa5]/g, ')" onbeforepaste= "Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\a-za-z\u4e00-\u9fa5]/g, ')) "

How to tell the text box in JavaScript can only output English letters, Chinese characters and numbers, cannot enter special characters!