//*** This code is copyright 2003 by Gavin Kistner, !@phrogz.net
//*** It is covered under the license viewable at http://phrogz.net/JS/_ReuseLicense.txt
//*** Reuse or modification is free provided you abide by the terms of that license.
//*** (Including the first two lines above in your source code satisfies the conditions.)

/*******************************************************************************
* This library keeps track of which radio button is selected in a set, via
*       var radioButton = myForm.selectedRadio.radioSetName;
*
* NOTE: This will not be updated if you change the selected button using code:
*       myForm.radioSetName[3].checked=true;
*
* NOTE: This destroys other onclick handlers for the radio buttons.
*       To preserve them, but screw Safari users, comment out the
*       "r.onclick=" line and uncomment the "AttachEvent(r,'click',...)" line
*
* v1.0    20030815  Initial Release
* v1.0.1  20030819  Safari fix put in.
***************************************************/

AttachEvent(window,'load',function(){
	var radios = document.getElementsByTagName('input');
	for (var i=0,len=radios.length;i<len;i++){
		var r = radios[i];
		if (r.type!='radio' || !r.form) continue;
		if (!r.form.selectedRadio) r.form.selectedRadio={};
		if (r.checked) r.form.selectedRadio[r.name]=r;

		r.onclick=UpdateRadioCache;     
		//Due to a bug in Safari, the following doesn't work.
		//AttachEvent(r,'click',UpdateRadioCache,false); 

		AttachEvent(r,'propertychanged',UpdateRadioCache,false);
	}
},true);

function UpdateRadioCache(evt){ var r = evt.srcElement || this; if (r.checked) r.form.selectedRadio[r.name]=r }


// Required AttachEvent() -- see http://phrogz.net/JS/AttachEvent_js.txt