Javascript Ass Ans

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Date:12 Sep 2011 Submitted by: Sonal MaheshwariASSIGNMENT 1 205109081Web Technology MCA V

Q1. Create an array of five pictures. Use a for loop to display the values stored there.

Now add two more pictures to the end of the array and sort the array. (UseJavaScript's built-in array methods.) Display the sorted array. Display the picturesalso.

var arr=new Array(5);

arr[0]="a.jpg";

arr[1]="c.jpg";

arr[2]="b.jpg";arr[3]="e.jpg";

arr[4]="c.jpg";

document.write("Array of five pictures!
");

for(i=0;i


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colors[red]="RED".fontcolor("red");

colors[green]="GREEN".fontcolor("green");

colors[blue]="BLUE".fontcolor("blue");

color[white]="WHITE".fontcolor("white");document.write("Colors!");

for(i in colors){

document.write(colors[i]+"
");

}

Q3. Create a function that will return the current month by its full name. Use theDate object to get the current month. Months are returned as 0 for January, 1 forFebruary, 2 for March, etc. Output should resemble:The current month is January.Hint: You can create an array, starting at index 0, and assign a month value to it;e.g., month[0]="January" or use a switch statement, e.g., case 0: return "January".

function getmon(x)

{switch(x)

{

case 0:return("January");

case 1:return("February");

case 2:return("March");

case 3:return("April");

case 4:return("May");

case 5:return("June");

case 6:return("July");

case 7:return("August");

case 8:return("September");

case 9:return("October");

case 10:return("November");

case 11:return("December");

}

}

var thisDate=new Date();

document.write("The current month is

"+getmon(thisDate.getMonth())+".");


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Q4. An invoice is due and payable in 90 days. Write a function that will display thatdate.

function findduedate()

{

var invDate=new Date();

var dueDate=new Date();

dt=prompt("Enter the invoice date details:-Date(dd):");

mon=prompt("Enter the invoice date details:-

Month(mm):");

yr=prompt("Enter the invoice date details:-Year(yyyy):");

mon=mon-1;

invDate.setDate(dt);

invDate.setMonth(mon);

invDate.setFullYear(yr);

//90 days =(90*24*60*60*1000) = 7776000000milliseconds

dueDate.setTime(invDate.getTime()+7776000000);

document.write("Due Date for the invoice is

"+dueDate.toDateString()+"");

}

Q6. To calculate the balance on a loan, the following formula is used:PV = PMT * ( 1 - (1 + IR )-NP) / IR

PV is the present value of the loan; PMT is the regular monthly payment of theloan; IR is the loan's interest rate; NP is the number of payments remaining. Write aJavaScript statement to represent this formula.


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Enter the monthly payment amount of the loan :

Enter the interest rate of the loan :

Enter the number of payments remaining :

Q7. Using the formula to calculate the loan balance from the last exercise, write afunction that will calculate the principle balance left on a loan where the monthlypayments are $600, the annual interest rate is 5.5%, and there are 9 yearsremaining on the loan. Use the toFixed() Number method to format the output.


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document.write("Ceil : "+Math.ceil(num)+"
");

document.write("Floor : "+Math.floor(num)+"
");

document.write("Round : "+Math.round(num)+"
");

Q9. Create an array of 10 fortune cookies that will be randomly displayed each timethe user reloads the page.

var a= new Array("A stitch in time saves 9","Too many cooks spoil

the broth", "Charity begins at home", "Spare the rod, spoil the

child", "Face is the index of mind");

function fortunecookie()

{

r=Math.random();

r=Math.floor(r*5);

document.write(""+a[r]+"");

}

Q10. Create a string prototype that can be used to create an italic, Verdana font,point size 26.

function stringobj()

{

return (""+(this.toString()).italics().fontsize("26pt")

+"");

}

String.prototype.fun = stringobj;

document.write("'Hello' in Verdana, 26 point size,

italicised
");

document.write("Hello".fun());


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Q11. Calculate the circumference of a circle using the Math object.


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Q13. Use the Date object to print today's date in this format:Today is Friday, June 16, 2003.

Javascript Test


document.write("Today is

"+thisDate.toLocaleDateString()+"");

Q14. Calculate and display the number of days until your next birthday.

Javascript Test

function calc()

{


var bDate=new Date();

var mon=prompt("Enter the month(mm) of your birthday:");

var dt=prompt("Enter the date(dd) of your birthday: ");

mon=mon-1;

bDate.setMonth(mon);

bDate.setDate(dt);

if((mon


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Calculating number of days until your next birthday...

Q15. Create a prototype for the Date object that will print the months starting at 1instead of 0. Create a String object containing "Jose lived in San Jose for manyyears."

Javascript Test


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Q17. Get the substring ear from years.

var str="years"document.write(""+str.substring(1,4)+"");

Q18. Display the string in a blue, italic font, point size 12, all uppercase.

Javascript Test

var str="Jose lived in San Jose for many years.";

str=str.fontcolor("blue").italics().fontsize("12pt").toUpperCase();

document.write(str);

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Javascript Ass Ans