JavaScript verifies that the form is not empty and gets the value and text of the Select drop-down list

Source: Internet
Author: User

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

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