1. JavaScript II

2. JavaScript Changing Time in the status bar function showTime() { var now = new Date(); var hours = now.getHours(); var minutes = now.getMinutes(); var seconds = now.getSeconds(); var timeStr = "" + ((hours > 12) ? hours - 12 : hours); timeStr += ((minutes < 10) ? ":0" : ":") + minutes; timeStr += ((seconds < 10) ? ":0" : ":") + seconds; timeStr += (hours >= 12) ? " P.M." : " A.M."; status = timeStr; // time is displayed in the Status Line setTimeout("showTime()", 1000); }

3. JavaScript Enable & disable select option function disable() { document.getElementById("mySelect").disabled=true;} function enable() { document.getElementById("mySelect").disabled=false;} Apple Banana Orange

4. JavaScript print Output all options function getOptions(){ var x=document.getElementById("mySelect"); var txt="All options: "; var i; for (i=0;i<x.length;i++) { txt=txt + "\n" + x.options[i].text; } alert(txt); } Apple Orange Banana

5. JavaScript print index of selected option function getIndex(){ var x=document.getElementById("mySelect"); alert(x.selectedIndex); } Select your favorite fruit: Apple Orange Banana

6. JavaScript Set text of selected option function changeText() { var x=document.getElementById("mySelect"); x.options[x.selectedIndex].text="Melon"; } Select your favorite fruit: Apple Orange Banana

7. JavaScript Remove selected option function removeOption() { var x=document.getElementById("mySelect"); x.remove(x.selectedIndex); } Apple Banana Orange

8. JavaScript Javascript function to check for all letters in a field function allLetter(inputtxt) { var letters = /^[A-Za-z]+$/; if(inputtxt.value.match(alphaExp)) { return true; } else { alert("message"); return false; } To get a string contains only letters (both uppercase or lowercase) we use a regular expression (/^[A-Za-z]+$/) which allows only letters. Next the match() method of string object is used to match the said regular expression against the input value. Here is the complete web document.

9. JavaScript II Checkbox checked function check(f) { if(f.elements[0].checked&&f.elements[1].checked) { var no=prompt("no of children? "); if(no==2)alert("U r eligible for the loan Rs 1000000"); else alert("U r eligible for loan Rs 50000"); } else alert("not eligible"); } Marital Status Children

10. JavaScript II Login form function validate(form){ var userName = form.Username.value; var password = form.Password.value; if (userName.length === 0) { alert("You must enter a username."); return false; } if (password.length === 0) { alert("You must enter a password."); return false; } Login Form Username: Password:

11. JavaScript II validates that the entry is formatted as an e-mail address function check(elem) { var str = elem.email.value; var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/; if (!str.match(re)) { alert("Verify the e-mail address format."); return false; } else { return true; } } E-mail Address:

12. JavaScript II Check fname is empty function validateForm(f) { var x=f.fname.value; if (x==null || x=="") { alert("First name must be filled out"); return false; } First name:

13. JavaScript II String reversal using charat and length property var my_str="nattop" var i=my_str.length; i=i-1; for (var x = i; x >=0; x--) { document.write(my_str.charAt(x)); }

14. JavaScript II

15. Hide & Show function show1() { document.getElementById('s').style.display='block'; } function show2() { document.getElementById('s').style.display='none'; } Show ME

16. JavaScript II function check() { if(document.getElementById('uname').value==""||document.getElementById('upass').value=="") { if(document.getElementById('uname').value=="") { document.getElementById('suname').style.display='block'; } else { document.getElementById('suname').style.display='none'; } if(document.getElementById('upass').value=="") { document.getElementById('supass').style.display='block'; } else { document.getElementById('supass').style.display='none'; } else { document.f.submit(); } Name Enter Name Passsword Enter Password