js 计算金额是否小于总金额，大于是不能保存

计算金额是否小于总金额，大于是不能保存

function kpjejs(oInput){

    var result = 0;

    var vresult = "kpsq_kpzje";//开票总金额

    var wkje = "kpsq_dbhtwkpje"//合同未开票金额

    var xh = $("input[name='inputline_kpsqmx_num']").val();//总条数

    xh = xh - 1;

    for(xh; xh >= 0; xh--){

        var dj = xh + "_kpsqmx_dj";//单价

        var sl = xh + "_kpsqmx_sl"//数量

        var dbdj = $("input[name='" + dj + "']").val();

        var dbsl = $("input[name='" + sl + "']").val();

        var dbwkje = $("input[name='" + wkje + "']").val();

        if(typeof(dbdj)==="undefined"){

            dbdj = 0;

        }

        if(typeof(dbsl)==="undefined"){

            dbsl = 0;

        }

        if(xh >= 0){

            result = result + dbdj * dbsl;//总金额

            $("input[name='" + vresult + "']").val(result);

            if(dbwkje < result){

                alert("开票金额不能大于合同未开票金额！请重新填写！");

                $("input[name='" + dj + "']").val("");

                $("input[name='" + sl + "']").val("");

                break;

            }

        }

    }

}

function htdjjs(oInput){

    var xh = $("input[name='inputline_hemx_num']").val();//总条数

    xh = xh - 1;

    for(xh; xh >= 0; xh--){

        var htdj = xh + "_hemx_dbprice";//合同单价

        var bjdj = xh + "_hemx_dbbjdj";//报价单价

        var dbhtdj = $("input[name='" + htdj + "']").val();

        var dbbjdj = $("input[name='" + bjdj + "']").val();

        if(xh >= 0){

            if(parseInt(dbbjdj) > parseInt(dbhtdj) && dbbjdj != ""){

                alert("合同单价不能小于报价单价！请重新填写！");

                $("input[name='" + htdj + "']").val("");

                break;

            }

        }

    }

}