function CalculateNow() {
     var fgauge;
     var fsealer1 = 0;
     var fsealer2 = 0;
     var fsealer3 = 0;
     var fwind;         
     var fht = 0;
     var fwt = 0;
     var flt = 0;
     var fcost = 0; 
     var fbag = 0;
     var ftemp = 0;

     if(Paksize.Leng.value == "") {
       alert("Please enter Package Length");
	   return false;
       }
     else {flt = Paksize.Leng.value
     } 

     if(Paksize.Width.value == "") {
       alert("Please enter Package Width")  
	   return false;    
     }
     else {fwt = Paksize.Width.value
     } 

     if(Paksize.Height.value == "") {
       alert("Please enter Package Height")
	   return false;
     }
     else {fht = Paksize.Height.value
     } 

     if(Paksize.Filmcost.value == "") {
       alert("Please enter Film Cost and check correct Button(Inch or Roll)")
	   return false;
     }
     else {fcost = Paksize.Filmcost.value
     } 

      if(Paksize.Gauge.selectedIndex == 0) {
       fgauge = 5830
     }
     if(Paksize.Gauge.selectedIndex == 1) {
       fgauge = 5250
     }     
     if(Paksize.Gauge.selectedIndex == 2) {
       fgauge = 4375
     }     
     if(Paksize.Gauge.selectedIndex == 3) {
       fgauge = 3500
     }     
     if(Paksize.Gauge.selectedIndex == 4) {
       fgauge = 2625
     }     
     if(Paksize.Gauge.selectedIndex == 5) {
       fgauge = 2100
     }     
     if(Paksize.Gauge.selectedIndex == 6) {
       fgauge = 1750
     }     
    
     
     
     if(fht <= 2.5) {
       fsealer2 = 2.0
       fbag = 1.0    
     }
     else if(fht >= 4.5) {
       fsealer2 = 3.0
       fbag = 2   
     }
     if(fsealer2 < 1) {
       fsealer2= 2.5
       fbag = 1.5 
    }
    
     if(fht < 3.0) {
       fsealer3 = 4.0
     }
     else if(fht > 6.0) {
       fsealer3 = 5.5
     }
    
     if(fsealer3 < 1.0) {
        fsealer3= 4.5
     }
    
      
     if(Paksize.Sealer.selectedIndex == 0) {
      fsealer1 = fsealer2
     }
     if(Paksize.Sealer.selectedIndex == 1) {
      fsealer1 = fsealer3
     }
     if(Paksize.Sealer.selectedIndex == 2) {
      fsealer1 = fsealer3
     }
     
        
            
      
      if(Paksize.Wind.selectedIndex == 0) {
       fgauge = fgauge
      Paksize.FW.value = parseFloat(fwt) + parseFloat(fht) + parseFloat(fsealer1)
     }     
   
     if(Paksize.Wind.selectedIndex == 1) {
       fgauge = fgauge *2
      Paksize.FW.value = 2*(parseFloat(fwt) + parseFloat(fht) + parseFloat(fsealer1))
     }     

     if(Paksize.Sealer.selectedIndex == 3) {
        fgauge = fgauge *2
      Paksize.FW.value = (2*(parseFloat(fwt) + parseFloat(fht))) + 1.5
      Paksize.Wind.selectedIndex = 1
      }

     Paksize.BL.value = parseFloat(flt) + parseFloat(fht)+ parseFloat(fbag)
     Paksize.Footage.value = fgauge     
     ftemp = (12*Paksize.Footage.value)/Paksize.BL.value
     Paksize.PPR.value = parseInt(ftemp)     
    
     if(Paksize.typecost[0].checked){
      ftemp = Paksize.Filmcost.value * Paksize.FW.value
      ftemp = Math.round( ftemp * 1000)/1000
      Paksize.CPR.value = ftemp
      Paksize.IP.value = Paksize.Filmcost.value
     } 
     else {
      ftemp = Paksize.Filmcost.value / Paksize.FW.value
      ftemp = Math.round( ftemp * 1000)/1000
      Paksize.IP.value = ftemp
      Paksize.CPR.value = Paksize.Filmcost.value
     }
      Paksize.CPP.value =  Math.round((Paksize.CPR.value / Paksize.PPR.value)*1000000)/1000000 
      Paksize.PPR2.value = Math.round((Paksize.FW.value * 2.1)*10)/10     
      Paksize.CPP2.value =  Math.round((Paksize.CPR.value / Paksize.PPR2.value)*1000)/1000 
      Paksize.FPD.value =  Math.round((Paksize.Footage.value / Paksize.CPR.value)*10000)/10000 
      Paksize.CPF.value =  Math.round((Paksize.CPR.value / Paksize.Footage.value)*10000)/10000 
 return false     
}
         

   

  

      function switchTM() {
      var tempwt=0;
      var templt=0;
    
      tempwt = Paksize.Leng.value 
      templt = Paksize.Width.value 
      Paksize.Leng.value = templt
      Paksize.Width.value = tempwt 
      
      }

   function clearform() {
      Paksize.Leng.value = ""
      Paksize.Width.value = ""
      Paksize.Height.value = ""
      Paksize.Filmcost.value = ""
      Paksize.Footage.value = ""
      Paksize.CPF.value = ""
      Paksize.PPR.value = ""
      Paksize.CPP.value = ""
      Paksize.BL.value = ""
      Paksize.FW.value = ""
      Paksize.CPR.value = ""
      Paksize.IP.value = ""
      Paksize.PPR2.value = ""
      Paksize.CPP2.value = ""
      Paksize.FPD.value = ""
      Paksize.Wind.selectedIndex = 0   
      Paksize.typecost.value = "inch"
}