รบกวนช่วยด้วยครับ (ด่วน) PHP เรื่อง การ reset ตัวแปรครับ

			<?php	$SumEPaper =  $NumEpaper * $epapers[0] ;
					$SumInk =  $NumInk * $Ink1[0] ;
					$SumPaper = $PaperRem * $Price_PaperCopyResuut[Paper_Price] ;
					
					$show = $Num_Book * (  ($SumEPaper + $SumInk + $SumPaper) + ($Price_BWoneResuut + $Price_BWtwoResuut + $Price_C_oneResuut + $Price_C_twoResuut) ) ;
			?>
		<!-- ------------------------------------------------------------ -->


					  <?php echo'<input type="submit" name="submit" value="คำนวนราคา">'?>
          
          				
					  <input type="button" value="Reset" OnClick="
					  document.form1.Page_One.value='0';
					  document.form1.Page_Two.value='0';
					  document.form1.EPaper_Name.value='';
					  document.form1.EPaper_Price.value='';
					  document.form1.EPaper_Num.value='0';
					  document.form1.Ink_Name.value='';
					  document.form1.Ink_Num.value='0';
					  document.form1.Ink_Price.value='';
					  document.form1.Paper_Size.value='';
					  document.form1.Paper_Weight.value='';
					  document.form1.Paper_Quantity.value='0';
					  document.form1.Paper_Price.value='';
					  document.form1.Pr_Size.value='';
					  document.form1.Pr_Weight.value='';
					  document.form1.Num_BW1.value='0';
					  document.form1.Num_BW2.value='0';
					  document.form1.Num_C1.value='0';
					  document.form1.Num_C2.value='0';
					  document.form1.Num_Book.value='';
                      
					  ">
                      </tr>
				
			</table>
<table width= 250 height= 100 border="1" align = "right">
				<tr align = "center">
					<td>
						<h2><p>ราคาทั้งหมด : <?php echo $show  ;  ?>
						บาท</p><h2> 

					</td>