1. Verify the form is not empty
var hasform = {"name": "Name",
"Id_card": "Identity card", "Paysalary": "Monthly Salary",
"Cardcode": "Account", "Fk_subjectf_code": "Functional Account",
"Birthday": "Date of birth", "start_date": "Start Time"
};
var result = true;
var value;
For (var k in hasform) {
Value = $ ("#" + K). Val ();
if (value = = "") {
Alert (Hasform [K] + "cannot be empty! ");
result = false;
Break
}
}
2. Get the value and text of the Select drop-down list
2.1 Native JS
1: Get the Select object: Var myselect=document.getelementbyid ("Test");
2 Get the index of the selected item: Var index=myselect.selectedindex; SelectedIndex represents the index of the item you selected
3: Get the selected options Value:myselect.options[index].value;
4: Get the selected options Text:myselect.options[index].text;
2.2 JQuery
1:var options=$ ("#test option:selected"); Gets the selected item
2:alert (Options.val ()); Get the value of the selected item
3:alert (Options.text ()); Get the text of the selected item
JavaScript verifies that the form is not empty and gets the value and text of the Select drop-down list