var fDesc=new Array(); fDesc[0] = "Using NO2 and HI equilibrium reactions your students will easily investigate the physical and chemical factors which influence gas equilibrium. Gas Equilibrium is designed for use with both junior and senior science students. 17 experiments in the form of blackline masters can be saved at any stage. Graphs show Concentration Curves and Reaction Rates. Reactions can be instantly brought to equilibrium."; function tShowHide(id, show) { var s = document.getElementById("desc"); if ((s.innerHTML.length<=212 || show==1) && show!=2) { s.innerHTML = fDesc[id]; if (document.getElementById('m1')) document.getElementById('m1').style.display='none'; if (document.getElementById('m2')) document.getElementById('m2').style.display='none'; if (document.getElementById('more_txt')) document.getElementById('more_txt').style.display='inline'; } else { s.innerHTML = ''; } }