寻求脚本支持！

Question

function moveTo(sel1,sel2,place)
            {
                ele1=document.all[sel1];
                ele2=document.all[sel2];
                if (ele1.value=="")
                {
                    alert("afacacacacacacacacacsscac");
                    return;
                }
                myEle = new Array();
                delEle = new Array();
                for (i=0;i<ele2.options.length;i++)
                {
                    myEle[i] = document.createElement("option");
                    myEle[i].value = ele2.options[i].value;
                    myEle[i].text = ele2.options[i].text;
                }
                len = ele2.options.length-1;
                k = 0;
                leftEleNo=0;
                for (j=0;j<ele1.options.length;j++)
                {
                    if (ele1.options[j].selected==true)
                    {
                        len++;
                        myEle[len] = document.createElement("option") ;
                        myEle[len].value = ele1.options[j].value;
                        myEle[len].text = ele1.options[j].text;
                    }
                    else
                    {
                        delEle[leftEleNo] = document.createElement("option") ;
                        delEle[leftEleNo].value = ele1.options[j].value;
                        delEle[leftEleNo].text = ele1.options[j].text;
                        leftEleNo++;
                    }
                }
                for (i=ele2.options.length;i>=0;i--)
                {
                    if (ele2.options[i])
                    {
                        ele2.options[i] = null;
                    }
                }
                for (i=ele1.options.length;i>=0;i--)
                {
                    if (ele1.options[i])
                    {
                        ele1.options[i] = null;
                    }
                }
                for (ii=0;ii<delEle.length;ii++)
                {
                    ele1.add(delEle[ii]);
                }
                for (ii=0;ii<myEle.length;ii++)
                {
                    ele2.add(myEle[ii]);
                }            }

Answer 1

functon test1()
{
document.texta.value=doucument.textb.value;
document.textb.value="";
}
functon test2()
{
document.textb.value=doucument.texta.value;
document.texta.value="";
}
<input type="button" value="ab" onclick='test2()'>
<input type="button" value="ba" onclick='test1()'>