function hlL(what) {

       what.parentNode.parentNode.style.background='url(/images/but_on.gif)'

}

function hL(what) {

       what.parentNode.parentNode.style.background='url(/images/but_off.gif)'

}



function SwitchColLeft() {
	col=document.getElementById('col_left').style.display;
	if (col=='none')document.getElementById('col_left').style.display='block';
	else document.getElementById('col_left').style.display='none';
SwitchLeftArrow();
}

function SwitchColRight() {

	col=document.getElementById('col_right').style.display;
	if (col=='none')document.getElementById('col_right').style.display='block';
	else document.getElementById('col_right').style.display='none';
SwitchRightArrow();
}