function numeric_check(){
	if(event.keyCode<48 || event.keyCode>57) 
		return event.returnValue=false;
}
function char_check(){
	if((event.keyCode<65 || event.keyCode>90) && (event.keyCode<97 || event.keyCode>122) && (event.keyCode!=32))
		return event.returnValue=false;
}

function validateForm(myForm)
{
	if(myForm.course.value=="")
	{
		alert("Please Select a Course !");
		myForm.course.focus();
		return false;
	}
	else if(myForm.rollno.value=="")
	{
		alert("Please Enter Your Roll No !");
		myForm.rollno.focus();
		return false;
	}
	return true;
}

function validateForm1(myForm)
{
	if(myForm.exam.value=="")
	{
		alert("Please Select a Examination !");
		myForm.exam.focus();
		return false;
	}else if(myForm.course.value=="")
	{
		alert("Please Select a Subject !");
		myForm.course.focus();
		return false;
	}
	else if(myForm.rollno.value=="")
	{
		alert("Please Enter Your Roll No !");
		myForm.rollno.focus();
		return false;
	}
	return true;
}