var fDesc=new Array(); fDesc[0] = "The Variable Density Yield Prediction (VDYP 7) Model is an empirical yield prediction system that replaces VDYP6. The new model is more sensitive to changes in stand density such as basal area and trees per hectare. It is intended for use in unmanaged, natural stands of pure or mixed species composition."; 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 = ''; } }