function check_quantity(id,min,max){var inp=document.getElementById('product_avail_'+id);if(!inp)return true;if(isNaN(inp.minQuantity))inp.minQuantity=min;if(isNaN(inp.maxQuantity))inp.maxQuantity=max;if(!isNaN(inp.minQuantity)&&!isNaN(inp.maxQuantity)){var q=parseInt(inp.value);if(isNaN(q)){alert(substitute(lbl_product_quantity_type_error,"min",inp.minQuantity,"max",inp.maxQuantity));return false}if(q<inp.minQuantity){alert(substitute(lbl_product_minquantity_error,"min",inp.minQuantity));return false}if(q>inp.maxQuantity){alert(substitute(lbl_product_maxquantity_error,"max",inp.maxQuantity));return false}}return true}