Restrict input type (multiple methods)

1. Only Chinese characters can be input and pasted  
<input οnkeyup="value=value.replace(/[^\u4E00-\u9FA5]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\u4E00-\u9FA5]/g,''))"><br/> 

3. Only numbers can be entered and pasted  
<input οnkeyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')" /><br/> 
4. Digital script  
<input οnkeyup="if(/\D/.test(this.value)){alert(' You can only enter Numbers ');this.value='';}"><br/> 

5. You can only input numbers and English  
<input οnkeyup="value=value.replace(/[\W]/g,'') " onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^\d]/g,''))"><br/> 

6. Simple forbid to input Chinese characters  
<input style="ime-mode:disabled"> Input method does not convert , But it can be pasted <br/> 

7. Enter numbers and decimal points  
<input οnkeyup="value=value.replace(/[^\d{1,}\.\d{1,}|\d{1,}]/g,'')" /><br/> 

8. Only numbers and "-", For example, when inputting time, you can use  
<input οnkeyup="value=value.replace(/[^\w&=]|_/ig,'')" οnblur="value=value.replace(/[^\w&-]|_/ig,'')" />

 

JS control input Input character limit  

ENTER Key to move the cursor to the next input box

The code is as follows :

<input οnkeydοwn="if(event.keyCode==13)event.keyCode=9" > Only in Chinese  
<input οnkeyup="value=value.replace(/[ -~]/g,'')" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> Masked input method <input style="ime-mode:disabled" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> Only English and numbers can be entered  
<input οnkeyup="value=value.replace(/[/W]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" οnkeydοwn="if(event.keyCode==13)event.keyCode=9"> It's just numbers  
<input οnkeyup="value=value.replace(/[^/d]/g,'') "onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))"> 

 

Can only display , Do not modify

The code is as follows :

<input readonly value=" Can only display , Do not modify "> Only numbers can be entered , Determine the value of the key  
<script language=javascript> 
function onlyNum() 
{ 
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105)||(event.keyCode==8))) 
event.returnValue=false; 
} 
</script> 
<input οnkeydοwn="onlyNum();"> 

 

1. Only numeric codes can be entered in the text box ( You can't enter a decimal point ) 
<input οnkeyup="this.value=this.value.replace(//D/g,'')" onafterpaste="this.value=this.value.replace(//D/g,'')"> 

2. You can only enter Numbers , Can enter decimal point . 
<input οnkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')"> 
<input name=txt1 οnchange="if(//D/.test(this.value)){alert(' You can only enter Numbers ');this.value='';}"> 

3. Number and decimal point method 2  

The code is as follows :

<input type=text t_value="" o_value="" οnkeypress="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value" οnkeyup="if(!this.value.match(/^[/+/-]?/d*?/.?/d*?$/))this.value=this.t_value;else this.t_value=this.value;if(this.value.match(/^(?:[/+/-]?/d+(?:/./d+)?)?$/))this.o_value=this.value" οnblur="if(!this.value.match(/^(?:[/+/-]?/d+(?:/./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.o_value=this.value}"> 

 

4. Only letters and Chinese characters can be entered  
<input οnkeyup="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 , Can't input Chinese  
<input οnkeyup="value=value.replace(/[^/w/.//]/ig,'')"> 

6. You can only input numbers and English  
<font color="Red">chun</font> 
<input onKeyUp="value=value.replace(/[^/d|chun]/g,'')"> 
7. There can only be up to two decimal places after the decimal point ( Numbers , Chinese can be input ), You can't enter letters and symbols :<input onKeyPress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 || //./d/d$/.test(value))event.returnValue=false">8. There can only be up to two decimal places after the decimal point ( Numbers , Letter , Chinese can be input ), You can enter the operation symbol : 
<input οnkeyup="this.value=this.value.replace(/^(/-)*(/d+)/.(/d/d).*$/,'$1$2.$3')"> 
It can only be numbers, decimal points and addition, subtraction and multiplication  
9. You can only enter Numbers 、 decimal point 、 negative  

The code is as follows :

<input name="input" type="text" οnkeyup="JHshNumberText(this)" id="title"> 

<script language="javascript" type="text/javascript">function JHshNumberText(a) 
{ 
var fa=""; 
if(a.value.substring(0,1)=="-") 
fa="-"; 
var str=(a.value.replace(/[^0-9.]/g,'')).replace(/[.][0-9]*[.]/, '.'); 
if (str.substring(0,1)==".") 
str="0"+str; 
a.value=fa+str; 
} 
</script> 

 

1. The dotted box when the Cancel button is pressed , stay input Add attribute values to hideFocus perhaps HideFocus=true 
<input type="submit" value=" Submit " hidefocus="true" /> 

2. Read only text box content , stay input Add attribute values to readonly 
<input type="text" readonly /> 

3. To prevent it from being emptied TEXT file ( Can handle style Content as a class reference ) 
<input type="text" style="behavior:url(#default#savehistory);" /> 

4.ENTER Key to move the cursor to the next input box  
<input type="text" οnkeydοwn="if(event.keyCode==13)event.keyCode=9" /> 

5. Chinese only ( There's a flash ) 
<input type="text" οnkeyup="value=value.replace(/[ -~]/g,'')" οnkeydοwn="if(event.keyCode==13)event.keyCode=9" /> 

6. Can only be a number ( There's a flash ) 
<input type="text" οnkeyup="value=value.replace(/[^/d]/g,'') " onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" /> 

7. Can only be a number ( No flash ) 
<input type="text" style="ime-mode:disabled" οnkeydοwn="if(event.keyCode==13)event.keyCode=9" οnkeypress="if ((event.keyCode<48 || event.keyCode>57)) event.returnValue=false" /> 

8. Only English and numbers can be entered ( There's a flash ) 
<input type="text" οnkeyup="value=value.replace(/[/W]/g,'')" onbeforepaste="clipboardData.setData('text',clipboardData.getData('text').replace(/[^/d]/g,''))" /> 

9. Masked input method  
<input type="text" name="url" style="ime-mode:disabled" οnkeydοwn="if(event.keyCode==13)event.keyCode=9" /> 

10. Input only Numbers , decimal point , minus sign （-） character ( No flash ) 
<input οnkeypress="if (event.keyCode!=46 && event.keyCode!=45 && (event.keyCode<48 || event.keyCode>57)) event.returnValue=false" /> 

11. Only two decimal places can be entered , Three decimal places ( There's a flash ) 
<input type="text" maxlength="9" οnkeyup="if(value.match(/^/d{3}$/))value=value.replace(value,parseInt(value/10)) ;value=value.replace(//./d*/./g,'.')" οnkeypress="if((event.keyCode<48 || event.keyCode>57) && event.keyCode!=46 && event.keyCode!=45 || value.match(/^/d{3}$/) || //./d{3}$/.test(value)) {event.returnValue=false}" />