js select all implementation and method to determine whether a check box is selected_javascript skills

The example in this article describes the implementation of js select all and the method of determining whether a check box is selected. Share it with everyone for your reference. The specific implementation method is as follows:

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function actionEvent(methodname){
      var form = document.forms[0];  
If(validateIsSelect(form.all, form.productids)){
              form.action='';
            form.submit();
          }else{ 
alert("Please select the record you want to operate");
                                                                                                              }
function allselect(allobj,items){

      var state = allobj.checked;
If(items.length){
for(var i=0;i If(!items[i].disabled) items[i].checked=state;
                                                                                                                                      }else{ 
If(!items[i].disabled) items.checked=state;
                                                                                                              }
/*
* Determine whether the record is selected
*/
function validateIsSelect(allobj,items){
      var state = allobj.checked;
If(items.length){
for(var i=0;i If(items[i].checked) return true;
                                                                                                                                      }else{ 
If(items.checked) return true;
                                                                                                                        return false;                                }

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The code is as follows:select all

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The code is as follows: I hope this article will be helpful to everyone’s JavaScript programming design.