What is a closure and why are they so useful to us?
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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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What is missing in my code? function numberTally(numList) { var evenTotal = 0; var oddTotal = 0; for (var i = 0; i <= numList.length; i++) { if i % 2 { // i is odd oddTotal += numList[i]; // or oddTotal = oddTotal + numList[i]; } else { // i is even evenTotal + numList[i]; } } alert(oddTotal); return evenTotal; }
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