function is_radio_selected( radio ) {
	if( radio.length > 0 ) {
		for( i=0; i < radio.length; i++ )
			if( radio[i].checked )
		        	return true;
		return false;
	}
	else
		return radio.checked;
}

function show_hide( $elem_name ) {
        elem=document.getElementById($elem_name);
	if( elem.style.display=='block' )
	        elem.style.display = 'none';
	else
	        elem.style.display = 'block';
}

function show( $elem_name ) {
        elem=document.getElementById($elem_name);
        elem.style.display = 'block';
}

function hide( $elem_name ) {
        elem=document.getElementById($elem_name);
        elem.style.display = 'none';
}

function set_radio_value( radio, value ) {
	if( radio.length > 0 ) {
		for( i=0; i < radio.length; i++ )
			if( radio[i].value == value ) {
			        radio[i].checked = true;
		        	return true;
			}
		return false;
	}
	else {
		if( radio.value == value ) {
			radio.checked = true;
			return true;
		}
		else {
		        return false;
		}
	}
}

function get_radio_value( radio ) {
	if( radio.length > 0 ) {
		for( i=0; i < radio.length; i++ )
			if( radio[i].checked ) {
			        return radio[i].value;
			}
	}
	else {
		if( radio.checked ) {
			return radio.value;
		}
	}
	return 'undefined';
}

function set_input_value( input, value ) {
		if( input.value != value ) {
			input.value = value;
		}
}

function clickclear(thisfield, xvalue) { 
	if(thisfield.value == xvalue)
	   thisfield.value = ""; 
}

function outpool(thisfield, xvalue) { 
		if(thisfield.value == "")
	   thisfield.value = xvalue;
}