function check_num(e){
var txt="Quantity ";
  if (!checkData(e.value)) {
    e.style.backgroundColor = '#FFCC66';
	e.focus(); 
	e.value=""; 
    txt = txt+" should be number!";
	alert(txt);
	return false;
  }
  e.style.backgroundColor = '#FFFFFF';
  return true;
}

function checkData(str)
{
    for( var i=0; i < str.length; i++) {
        var ch = str.substring( i, i+1 );
        if(ch < "0" || ch > "9") 
            return false;              
    }    
    return true;
}

function  check_addtocart(e) { 
	var textcart="";
	var fg=1;
	
	if (textcart == "") {  e.submit();  return true; } 
	else { alert(textcart); return false; 	}		
}


function  check_addtocart1(e) { 
	var textcart="";
	var fg=1;
	
	if ((e.quantity.value == null) || (e.quantity.value == "") || (e.quantity.value == 0)) { textcart = "Quantity is Required.\n"; fg=0; }
    
    if (fg == 1) {		 
		 if ( Number(e.quantity.value) > Number(e.stockqty.value) ) { textcart = "Quantity you ordered is out of Stock.\n"; } 
	}
	
	if (e.quantity.style) e.quantity.style.backgroundColor = textcart != "" ? '#FFCC66':'#FFFFFF';
	
	if (textcart == "") {  e.submit();  return true; } 
	else { alert(textcart); return false; 	}		
}

function CheckAll(form)
  {
  for (var i=0;i<form.elements.length;i++)
    {
    var e = form.elements[i];
    if (e.Name != "checkall")
       e.checked = form.checkall.checked;
    }
  }