Java script of Change password

var msg="The following fields are necessary\n\n"

var a=document.form1.txtOld.value.length;

var b=document.form1.txtNew.value.length;

var c=document.form1.txtConfirm.value.length;

var NewPwd = document.getElementById("txtNew").value;

var ConfirmPwd = document.getElementById("txtConfirm").value;

 

if(a==0)

{

msg=msg+"* Old Password\n";

alert(msg);

document.getElementById("txtOld").focus();

}

else if(b==0)

{

msg=msg+"* New password\n";

alert(msg);

document.getElementById("txtNew").focus();

}

else if(c==0)

{

msg=msg+"* confirm Password \n";

alert(msg);

document.getElementById("txtConfirm").focus();

}

else if(NewPwd!=ConfirmPwd)

{

alert('New Password and Confirm Password did not mathed');

document.getElementById("txtNew").value= '';

document.getElementById("txtConfirm").value= '';

document.getElementById("txtNew").focus();

}

else

{

return true;

}

return false

}