function addToCart(formName)
{

	var quantity = formName.quantity.value;
	quantity = Trim(quantity);
	if(quantity==""){
		alert("Please enter the  quantity");
		formName.quantity.value="";
		formName.quantity.focus();
		return false;
	}
	if(quantity=="0"){
		alert("Please enter the positive quantity"); 
		formName.quantity.value="";
		formName.quantity.focus();
		return false;
	}
	if(quantity=="00"){
		alert("Please enter the positive quantity"); 
		formName.quantity.value="";
		formName.quantity.focus();
		return false;
	}
	if(!IsNumeric(quantity)) {
		alert("Please  enter the valid  quantity");
		formName.quantity.value="";
		formName.quantity.focus();
		return false;
	}
		//formName.submit();
		return true;
}

//***trim 
function Trim(str){
	var count =str.length;
	var c=1;
	while(str.charAt(0)==" " || str.charAt(0)=="\t"){
		str=str.substring(1,str.length);

		if(c==count){
			break;
		}
	c=c+1;
	}
	return str;
}

function IsNumeric(sText)

{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;

 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
}