var onecount; onecount=0; subcat = new Array(); subcat[0] = new Array('瑞安水产城','公司宣传','瑞安水产城'); onecount=1; function changebsort(kindid) { document.myform.ssort.length = 0; var kindid=kindid; var i; for (i=0;i < onecount; i++) { if (subcat[i][1] == kindid) { document.myform.ssort.options[document.myform.ssort.length] = new Option(subcat[i][0], subcat[i][2]); } } }