function numericcheck()
{
	if(!isNS4)
	{
		if(event.keyCode < 47 || event.keyCode > 58) 
		event.returnValue = false;
	}
	else
	{
		if(event.which < 47 || event.which > 58) 
		returnfalse;
	}
}

function numericdotcheck()
{      
	if(!isNS4)
	{
		if(event.keyCode==46 || event.keyCode < 47 || event.keyCode > 58) 
		event.returnValue = false;
	}
	else
	{
		if(event.which==46 || event.which < 47 || event.which > 58) 
		returnfalse;
	}
}
function alphabetcheck()
{
	if(!isNS4)
	{
		if(event.keyCode > 46 && event.keyCode < 59) 
		event.returnValue = false;
	}
	else
	{
		if(event.which > 46 && event.which < 59) 
		returnfalse;
	}

}
function numericdotcheck()
{
	if(!isNS4)
	{
		if((event.keyCode < 47 || event.keyCode > 58) && event.keyCode!=46) 
		event.returnValue = false;
	}
	else
	{
		if((event.which < 47 || event.which > 58) && event.which!=46) 
		returnfalse;
	}
}