<script type="text/javascript">
//初始化获取的行列
var currentLine= 0;
var currentCol=0;
function keyDown(obj){
var _row = obj.parentNode;
currentCol = _row.cellIndex;
currentLine = _row.parentNode.rowIndex;
e=window.event||e;
switch(e.keyCode){
case 37: //左键
currentCol--;
changeItem();
break;
case 38: //向上键
currentLine--;
changeItem();
break;
case 39: //右键
currentCol++;
changeItem();
break;
case 40: //向下键
currentLine++;
changeItem();
break;
default:
break;
}
}
//方向键调用
function changeItem(){
if(document.all)
var it=document.getElementByIdx("specificationsTable").children[0];
else
var it=document.getElementById("specificationsTable");
if(currentLine<0){
currentLine=it.rows.length-1;
}
if(currentLine==it.rows.length){
currentLine=0;
}
var objtab=document.all.specificationsTable;
var objrow=objtab.rows[currentLine].getElementsByTagName("INPUT");
if(currentCol<0){
currentCol=objrow.length-1;
}else if(currentCol==objrow.length){
currentCol=0;
}
objrow[currentCol].select();
}
</script>