function getCheckboxValue( chkObj ) {
   // return: array
   var arr = new Array();
   var xx = 0;

   if ( chkObj[0] ) {
      for (var i=0; i < chkObj.length; i++) {
         if ( chkObj[i].checked )
            arr[xx++] = chkObj[i].value;
      }
   }
   else {
      if ( chkObj.checked )
         arr[xx++] = chkObj.value;
   }

   arr.length = xx;  
   return ( arr );
}


function IsNullCheckbox( chkObj ) {
   // return: boolean
   return ( getCheckboxValue(chkObj).length == 0 );
}

function getRadioValue( radioObj ) {
   // return: string
   for (var i=0; i < radioObj.length; i++) {
      if ( radioObj[i].checked )
         return ( radioObj[i].value );
   }
   return ( "" );
}

function getSelectValue( selObj ) {
	// returns single item only  -- use getSelectMultiValue( ) for multi select fields
	val = "";
	if( selObj.selectedIndex != -1 ) {
		val = selObj.options[selObj.selectedIndex].value;
		if(val == "") {
			val = selObj.options[selObj.selectedIndex].text;
		}
	}	
	return val;
}

function getSelectMultiValue( obj ) {
   // return: array  -  use with multi select input fields
   //  use getSelectMultiValue( nobj ).length < 1   to check for no values selected 
   var arr = new Array();
   var x = 0;
      for (var i=0; i < obj.length; i++) {
         if ( obj.options[i].selected )
            arr[x++] = obj.options[i].text;
      }
   arr.length = x;  
   return ( arr );
}


function replaceSubstring(srcStr, findStr, repStr) {
	while(srcStr.indexOf(findStr) >= 0) {
		srcStr = srcStr.replace(findStr, repStr);
	}	
	return srcStr;
}