gridview中前5列的和赋值给第6列的JS的问题,急!急!大侠们帮帮忙!!

[dwfxh123]

function DoCal()
{
　var e = event.srcElement;
　var row = e.parentNode.parentNode;
　var txts = row.all.tags("INPUT");
　if (!txts.length || txts.length <9)
　　return; 　
　var a = txts[txts.length-8].value;
　var b = txts[txts.length-7].value;
　var c = txts[txts.length-6].value;
　var q = txts[txts.length-5].value;
　var p = txts[txts.length-4].value;
　if (isNaN(q) || isNaN(p) || isNaN(a) || isNaN(b) || isNaN(c) )
　return;
　q = parseFloat(q);
　p = parseFloat(p);
　a = parseFloat(a);
　b = parseFloat(b);
　c = parseFloat(c);
　
　txts[txts.length-3].value = (a+b+c+q+p).toFixed(2);
}
用来实现gridview中前5列的和赋值给第6列这个功能,哪里错了,提示stack overflow at line :0这个错误

[dwfxh123]

我顶

[sohighthesky]

上完整代码

[dwfxh123]

ding