js checkbox 全选事件

 选择		

 "/>

     function selectAll(){
 	 var checkbox = document.getElementsByName('linId')
 	 var isallon=0
 	 for(var i = 0 ;i

function checkData() {
var box = document.getElementsByName("linId");
if(box.length>0) {
var checked = false; 
for(var i=0; i if(box[i].checked == true) {
checked = true;
}
}
if(!checked) {
MyAlert("请选择要取消的记录!");
}else {
return true;
}
}else {
return false;
}
}