function doddkm(){    var ran = Math.random();    var loan_id = document.all.LOAN_ID.value;    var arr = window.showModalDialog("..src");    if ( arr != null && arr.length > 0){        document.all.LOAN_ID.value = arr[0];    }}

在子窗口操作，返回一个array，写出这样也可以

function doddkm(){    var ran = Math.random();    var loan_id = document.all.LOAN_ID.value;    var arr = eval(window.showModalDialog("..scr "));    if ( arr != null && arr.length > 0){        document.all.LOAN_ID.value = arr[0];    }}