function chcek_numeric(e)
{
	
	var isIE = (window.event) ? 1 : 0;
	if (isIE)
	{
		if (e.keyCode < 47 || e.keyCode >57 ) 
		{ 
			e.returnValue = false;
		}
	}
	else
	{

		if ( e.which < 47 || e.which >57 ) 
		{
			if ( e.which != 8 ) e.preventDefault();
		}
	}
	
}
function checkval()
{
    var setval=false
    var ob = document.getElementById("cart_quantity");
	if(ob)
	{
	  if((ob.value) == "")
	  {
		ob.value = 0
	  }
	  if(parseInt(ob.value) > 0)
	  {
	    var i= document.BB_BuyButtonForm.item_selection_1.value
	    var qa = document.getElementById("item_option_quantity_"+i)
		qa.value = ob.value;
	    setval = true
	  }
	}
	
  if(setval) return true
  else alert("You have to give the value of quantity")
  
}