$(function(){
    //datatables基本设置
    $.extend( $.fn.dataTable.defaults, {
        paging: false,
        ordering: false,
        searching: false,
        info: false,
        scrollX: true,
        scrollY: '500px',
        scrollCollapse: true
    } );
});
function RegNum(obj,e,decimal)
{
    var pos = obj.selectionEnd;
    var event = e || window.event;
    var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
    if(keyCode != 37 && keyCode != 39){
        //先把非数字的都替换掉，除了数字和.
        obj.value = obj.value.replace(/[^\d.]/g,"");
        //保证第一个数字为0后，第二个数字不能为0
        obj.value = obj.value !== '0' ? obj.value.replace(/^0+/,'').replace(/^\./,"0.") : obj.value;
        //保证只有出现一个.而没有多个.
        obj.value = obj.value.replace(/\.{2,}/g,".");
        //必须保证第一个为数字而不是.
        obj.value = obj.value.replace(/^\./g,"");
        //保证.只出现一次，而不能出现两次以上
        obj.value = obj.value.replace(".","$#$").replace(/\./g,"").replace("$#$",".");
        //只能输入deciaml 位小数
        var reg = new RegExp("^(\\-)*(\\d+)\\.(\\d{1,"+decimal+"}).*$");
        obj.value = obj.value.replace(reg,'$1$2.$3');
    }
    obj.setSelectionRange(pos,pos);
}
function RegAutoNum(obj,e,site){
    var pos = obj.selectionEnd;
    var event = e || window.event;
    var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
    if(keyCode != 37 && keyCode != 39){
        //先把非数字的都替换掉，除了数字
        obj.value = obj.value.replace(/[^\d]/g,"");
        //只能输入deciaml 位小数
        // var reg = new RegExp("^\d{"+site+"}");
        // obj.value = obj.value.replace(reg,'$1');
    }
    obj.setSelectionRange(pos,pos);
}