function chk_int (x)
	{

		if (x.value == "") { 
			alert ("Please enter a quantity");
			return false;
		}
	

		pattern = /^[0-9]*$/; 

		if(pattern.test(x.value) == false)
		{
			alert("This value must be an Integer");

			//x.value="";
			x.focus();
			return false;
		}

		return true;
	}