JAVASCRIPT实现翻页保存已勾选的项目

时间:2022-08-15 06:16:07
<input type="checkbox" name="a" value="1" /><br/>
<input type="checkbox" name="a" value="2" /><br/>
<input type="checkbox" name="a" value="3" /><br/>
<input type="checkbox" name="a" value="4" /><br/> <input type="button" onclick="changeIds()" /> <script type="text/javascript">
checkedIds="";//翻页保存选中的id function changeIds(){
var oneches=document.getElementsByName("a");
for(var i=0;i<oneches.length;i++){
if(oneches[i].checked==true){
//避免重复累计id (不含该id时进行累加)
if(checkedIds.indexOf(oneches[i].value)==-1){
checkedIds=checkedIds+oneches[i].value+",";
}
}
if(oneches[i].checked==false){
//取消复选框时 含有该id时将id从全局变量中去除
if(checkedIds.indexOf(oneches[i].value)!=-1){
checkedIds=checkedIds.replace((oneches[i].value+","),"");
}
}
}
alert(checkedIds);
} function getChecked(){
checkedIds = '4,1,';
var oneches=document.getElementsByName("a");
for(var i=0;i<oneches.length;i++){
//全局变量中含有id,则该复选框选中
if(checkedIds.indexOf(oneches[i].value)!=-1){
oneches[i].checked=true;
}
} alert(checkedIds);
} getChecked();
</script>