联动选择菜单
<HTML><HEAD><META http-equiv='Content-Type' content='text/html; charset=gb2312'><TITLE>联动选择菜单</TITLE></HEAD><BODY ><script language="JavaScript"><!--var subcat = new Array();subcat = new Array('10','1','=1')subcat = new Array('10','2','=2')subcat = new Array('10','3','=3')subcat = new Array('10','4','=4')subcat = new Array('10','5','=5')subcat = new Array('10','6','=6')subcat = new Array('10','7','=7')subcat = new Array('10','8','=8')subcat = new Array('10','9','=9')subcat = new Array('10','10','=10')subcat = new Array('20','11','=11')subcat = new Array('20','12','=12')subcat = new Array('20','13','=13')subcat = new Array('20','14','=14')subcat = new Array('20','15','=15')subcat = new Array('20','16','=16')subcat = new Array('20','17','=17')subcat = new Array('20','18','=18')subcat = new Array('20','19','=19')subcat = new Array('20','20','=20')function changeselect1(locationid){document.form1.s2.length = 0;document.form1.s2.options = new Option('==请选择==','');for (i=0; i<subcat.length; i++){if (subcat == locationid){document.form1.s2.options = new Option(subcat, subcat);}}}//--></script><form name="form1">二级联动：<select name="s1" onChange="changeselect1(this.value)"><option>==请选择==</option><option value="10">1-10</option><option value="20">11-20</option></select><select name="s2" onChange="alert(this.value)"> <option>==请选择==</option></select></form><!-- 二级联动 Over --><!-- 三级联动 Start --><script language="JavaScript"><!--var subval = new Array();subval = new Array('10','单数','1','=1')subval = new Array('10','双数','2','=2')subval = new Array('10','单数','3','=3')subval = new Array('10','双数','4','=4')subval = new Array('10','单数','5','=5')subval = new Array('10','双数','6','=6')subval = new Array('10','单数','7','=7')subval = new Array('10','双数','8','=8')subval = new Array('10','单数','9','=9')subval = new Array('10','双数','10','=10')subval = new Array('20','单数','11','=11')subval = new Array('20','双数','12','=12')subval = new Array('20','单数','13','=13')subval = new Array('20','双数','14','=14')subval = new Array('20','单数','15','=15')subval = new Array('20','双数','16','=16')subval = new Array('20','单数','17','=17')subval = new Array('20','双数','18','=18')subval = new Array('20','单数','19','=19')subval = new Array('20','双数','20','=20')function changeselect2(){document.form2.s2.length = 0;document.form2.s2.options = new Option('==请选择==','');document.form2.s2.options = new Option('选择单数','单数');document.form2.s2.options = new Option('选择双数','双数');document.form2.s3.length = 0;document.form2.s3.options = new Option('==请选择==','');}function changeselect3(sub1,sub2){document.form2.s3.length = 0;document.form2.s3.options = new Option('==请选择==','');for (i=0; i<subval.length; i++){if ((subval == sub1) & (subval == sub2)){document.form2.s3.options = new Option(subval, subval);}}}//--></script><form name="form2">三级联动：<select name="s1" onChange="changeselect2()"><option>==请选择==</option><option value="10">1-10</option><option value="20">11-20</option></select><select name="s2" onChange="changeselect3(document.form2.s1.value,this.value)"> <option>==请选择==</option></select><select name="s3" onChange="alert(this.value)"> <option>==请选择==</option></select></form><!-- 三级联动 Over --></BODY></HTML>
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