var d=document;var variant;function addRow()
{ans_var=d.getElementById('variant').value;var tabbody=d.getElementById('answers').getElementsByTagName('TBODY')[0];var row=d.createElement("TR");number=tabbody.getElementsByTagName("TR").length;num=number+1;if(number>19){alert("Максимум 20 вариантов");return false;}
tabbody.appendChild(row);var td1=d.createElement("TD");var td2=d.createElement("TD");row.appendChild(td1);row.appendChild(td2);td1.innerHTML="Вариант "+(number+1);td2.innerHTML="<input type=\"text\" id=\"ans_var"+num+"\" name=\"ans_var["+num+"]\" size=40 value=\""+ans_var+"\">";d.getElementById('variant').value="";}