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What is callback?


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More JavaScript Interview Questions

Is array an object javascript?

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What are the different boolean operators in JavaScript?

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How to have the status line update when the mouse goes over a link (the support of the status line is sporadic)?

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what is difference between client side scripting and server side scripting?

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Write a program to check whether a given number is a palindrome or not?

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How do I turn on javascript on my phone?

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hi i want validations for two drop down lists. when user enter to second list by skipping first list alert box should appear. <HTML><HEAD> <TITLE>drop down validation</TITLE> <script type="text/javascript"> function validateForm(){ if(document.ItemList.Item.selectedIndex==0) { alert("Please select item from first list."); document.ItemList.Item.focus(); return false; } return true; } </SCRIPT> </HEAD> <BODY> Please choose an item from the drop down menu: <form name="ItemList" method="post" action="asp.html" onsubmit="validateForm()"> <table width="100%" border="0"> <tr> <td width="135">Choose a username: </td> <td> <select name="Item"> <option value selected> SELECT </option> <option value>Apples</option> <option value>Oranges</option> </select> <table width="100%" border="0"> <tr> <td width="135">Choose a username: </td> <td> <select name="Item" onclick="validateForm()"> <option value selected> SELECT </option> <option value>Apples</option> <option value>Oranges</option> </select> <input type="submit" name="Submit" value="Submit"> </td></tr></table></form> </BODY> </HTML> please any body help me thanks

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Describe javascript and vbscript.

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What is a good javascript editor?

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How to open url in a new tab in javascript?

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What is difference between arrow function and normal function?

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You have an asp. Net web application running on a web-farm that does not use sticky sessions - so the requests for a session are not guaranteed to be served the same machine. Occasionally, the users get error message validation of view state mac failed. What could be one reason that is causing this error?

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