function trim(str, chars) {
	return ltrim(rtrim(str, chars), chars);
}
 

function AlterSForm(){
	
	if(document.formAddress.elements[0].value == 'product_service'){
		if(document.formAddress.elements[1].value.length < 8){
			alert("POLAR SERIAL Required");
			return false;
		}else{
			document.formAddress.elements[1].style.color="green"; 
	    document.formAddress.elements[1].style.backgroundColor="green"; 
			document.formAddress.elements[1].readOnly = true;
			document.getElementById("message").value = "|(SERIAL:" + document.formAddress.elements[1].value + ")| ";		
			return true;	
		}
	}
	
}