function document.onkeydown() {
    if (event.keyCode == 13 && event.srcElement.type != "textarea" && event.srcElement.type != 'button' && event.srcElement.type != 'submit' && event.srcElement.type != 'reset' && event.srcElement.type != '') {
        event.keyCode = 9;
    }
    if (event.keyCode == 8 && event.srcElement.type != "text" && event.srcElement.type != "textarea" && event.srcElement.type != "password") {
        event.keyCode = 0;
        event.returnvalue = false;
    }
}
function KeyDownNothing() {
    if (event.keyCode == 13) {
        //在页面form中，按回车不触发事件
        return false;
    }
}
function KeyDownDoButton(btn) {
    if (event.keyCode == 13) {
        //btn指对应的按扭对象
        btn.click();
    }
}


function checkNum(obj) {
    var n = parseFloat(obj.value);
    if (isNaN(n)) {
        obj.value = "0";
        return false;
    }
    else {
        obj.value = n;
        return true;
    }
}

//function setExt()
//{
//    try
//    {
////        Ext.onReady(function ()
////        {
////            Ext.isGecko = true;
////        });
//        window.document.attachEvent("onkeydown", function () {
//            if (window.event.keyCode == 13) {
//                window.event.keyCode = 9;
//            }
//        }); 
//    }
//    catch (e)
//    {
//        setTimeout("setExt()", 100);
//    }
//}
//setTimeout("setExt()", 100);