var fDesc=new Array(); fDesc[0] = "How do you know if a chemical equation is balanced? What can you change to balance an equation? Play a game to test your ideas! Recognize that the number of atoms of each element is conserved in a chemical reaction. Describe the difference between coefficients and subscripts in a chemical equation."; 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 = ''; } }