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Tip of the Day
Language: Web
Expertise: Intermediate
Feb 10, 2003

Get Data from a Single Radio button with Javascript


Auto-generated radio buttons cause a special case where one radio button may be created. Reading back a single radio button is different to reading from a group of radio buttons.

Take a radio button(s) called quoteList—where the value is an integer:
 
	if (isNaN(frmData.quoteList.length)){
		// branch required because radio button 
handling is different for single row lists
		//(no element array for singles)
		if (frmData.quoteList.checked){
			intID = frmData.quoteList.value;
		}
	}
	else{
		// get which policy is selected
		for(intCounter=1;intCounter <= frmData.quoteList.length;intCounter++){
			if 
(frmData.quoteList[intCounter-1].checked) {
				intID = 
frmData.quoteList[intCounter-1].value;
			}
		}
	}
Colm Gallagher
 
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