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JS detection Radio The selection box is selected

Source: Internet
Author: User
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In order to correct the submission of the form, before the submission will be the form of each item validation, today brings is using JavaScript for radio validation, to determine the number of radio box, which is selected, or to remove its value, the following HTML code, including JS parts:

The code is as follows Copy Code
<HTML>
<script language= "VBScript" >
function Checkme ()
For each OB in Radio1
If Ob.checked Then
Window.alert Ob.value
Next
End Function
</script>
<BODY>
<input name= "Radio1" type= "Radio" value= "/style" Checked>style
<input name= "Radio1" type= "Radio" value= "/test" >barcode
<input type= "button" value= "Check" onclick= "Checkme ()" >
</BODY>
</HTML>

This function returns the selected radio value and verifies which radio is selected.

Example 2

The code is as follows Copy Code

&LT;TITLE&GT;JS Determine if Radio radio button is selected </title>
<script type= "Text/javascript" >
function Validateradio ()
{
var radioselete = "Nothing";
var Seletedvalue;
for (i=0;i<document.form1.rvalue.length;i++)
{
if (document.form1.rvalue[i].checked)
{
Radioselete = "seleted";
Seletedvalue = Document.form1.rvalue[i].value;
}
}
if (Radioselete = "Nothing")
{
Alert ("Please select a place name.") ");
return false;
}
Else
{
Alert ("You selected is:" +seletedvalue);
return true;
}
}
</script>
<body>
<form name= "Form1" >
<input type= "Radio" name= "RValue" value= "Sichuan" > Sichuan
<input type= "Radio" name= "RValue" value= "Jiangsu" > Jiangsu
<input type= "Radio" name= "RValue" value= "Nanjing" > Nanjing
<input type= "Radio" name= "RValue" value= "Tianjin" > Tianjin
<input type= "Radio" name= "RValue" value= "Shanghai" > Shanghai
<input type= "button" onclick= "Return Validateradio ()" value= "Authentication" >
</form>
</body>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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