function checkPayementDetails(obj) {
	var error = 0;
	var msg="";

	if(trim(obj.item_name_1.value)=="") {
       msg +="ERROR: Please enter product \n";
	   error = error + 1;
	    
	}
	
	if(trim(obj.invoice_no.value)=="") {
       msg +="ERROR: Please enter invoice number \n";
	   error = error + 1;
	    
	}
	  if(trim(obj.item_price_1.value)=="") {
       msg +="ERROR: Please enter price \n";
	   error = error + 1;
	    
	}
	if(error > 0) {
		alert(msg);
		return false;
     }
    if (error == 0) {
        var desc_str = obj.description.value;
        var invoice = obj.invoice_no.value;
        var final_desc = desc_str + ' Invoice no:[' + invoice + '].'; 
        obj.item_description_1.value = final_desc;
		//obj.submit();
	    return true;
    }

	return false;
}


// Removes leading whitespaces
function LTrim( value ) {
	
	var re = /\s*((\S+\s*)*)/;	
	return value.replace(re, "$1");
	
}

// Removes ending whitespaces
function RTrim( value ) {
	
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1");
	
}

// Removes leading and ending whitespaces
function trim( value ) {

 return LTrim(RTrim(value));
	
}