function switchHeight(elementID) {
		//test=confirm(elementID);
		//get the height of the element, different code to accomodate all browsers
		if(document.getElementById(elementID).offsetHeight){
			height=document.getElementById(elementID).offsetHeight;
		}
		else if(document.getElementById(elementID).style.pixelHeight){
			height=document.getElementById(elementID).style.pixelHeight;
		} 
		//test=confirm(height);
		if (height > 22) {	//collapse the element
			document.getElementById(elementID).style.height='16px';
			document.getElementById(elementID).style.background='url(/imagenes/capas/capas_off_1.gif)';
		} else {			//expand the element
			document.getElementById(elementID).style.height='auto';
			document.getElementById(elementID).style.background='url(/imagenes/capas/capas_on_1.gif)';
		}
}