function showcredit()



{

var credit

credit="Script programmed by Jens T.Saetre 15022001"

credit+="\n08122002 Changed layout"

credit+="\n30082003 Added conversion from IF input to rx frequency"

window.alert(credit);







//var theResponse = window.prompt("Welcome?","Enter your name here.");



}







function LO9750()

{

document.IF.RxFrequency.value=(1*document.IF.IF9750.value)+9750;

}



function LO5150()

{

document.IF.RxFrequency.value=5150-(1*document.IF.IF5150.value);

}





function LO10000()

{

document.IF.RxFrequency.value=(1*document.IF.IF10000.value)+10000;

}



function LO10050()

{

document.IF.RxFrequency.value=(1*document.IF.IF10050.value)+10050;

}



function LO10600()

{

document.IF.RxFrequency.value=(1*document.IF.IF10600.value)+10600;

}



function LO10750()

{

document.IF.RxFrequency.value=(1*document.IF.IF10750.value)+10750;

}



function LO11000()

{

document.IF.RxFrequency.value=(1*document.IF.IF11000.value)+11000;

}



function LO11200()

{

document.IF.RxFrequency.value=(1*document.IF.IF11200.value)+11200;

}



function Calculate()



{



var RX_Frequency,IF9750,IF1000,IF10050,IF10600,IF10750,IF11000,IF11200,RxMin,RxMax







RX_Frequency=1*document.IF.RxFrequency.value;



RxMin=1*document.IF.RxMin.value;



RxMax=1*document.IF.RxMax.value;







IF5150=RX_Frequency-5150;



if ((Math.abs(IF5150)>=RxMin)&&(Math.abs(IF5150)<=RxMax) ) 



    document.IF.IF5150.value=formatvalue(-IF5150, 6);



else  document.IF.IF5150.value="N/A";











IF9750=RX_Frequency-9750;



if (  (IF9750>=RxMin)&&(IF9750<=RxMax)  )



    document.IF.IF9750.value=formatvalue(IF9750, 6);



else  document.IF.IF9750.value="N/A";















IF10000=RX_Frequency-10000;



if ( (IF10000>=RxMin)&&(IF10000<=RxMax) ) 



    document.IF.IF10000.value=formatvalue(IF10000, 6);



else  document.IF.IF10000.value="N/A";











IF10050=RX_Frequency-10050;



if ((IF10050>=RxMin)&&(IF10050<=RxMax) ) 



    document.IF.IF10050.value=formatvalue(IF10050, 6);



else  document.IF.IF10050.value="N/A";







IF10600=RX_Frequency-10600;



if (   (IF10600>=RxMin)&&(IF10600<=RxMax)  ) 



    document.IF.IF10600.value=formatvalue(IF10600, 6);



else  document.IF.IF10600.value="N/A";







IF10750=RX_Frequency-10750;



if (  (IF10750>=RxMin)&&(IF10750<=RxMax) ) 



    document.IF.IF10750.value=formatvalue(IF10750, 6);



else  document.IF.IF10750.value="N/A";















IF11000=RX_Frequency-11000;



if ( (IF11000>=RxMin)&&(IF11000<=RxMax) ) 



    document.IF.IF11000.value=formatvalue(IF11000, 6);



else  document.IF.IF11000.value="N/A";











IF11200=RX_Frequency-11200;



if ( (IF11200>=RxMin)&&(IF11200<=RxMax) ) 



    document.IF.IF11200.value=formatvalue(IF11200, 6);



else  document.IF.IF11200.value="N/A";















//window.alert(IF10750+"\n"+RX_Frequency );











}



















function formatvalue(input, rsize) // Desimal avrunding



  {



   var invalid = "**************************";



   var nines = "999999999999999999999999";



   var strin = "" + input;



   var fltin = parseFloat(strin);



   if (strin.length <= rsize) return strin;



   if (strin.indexOf("e") != -1 ||



       fltin > parseFloat(nines.substring(0,rsize)+".4"))



      return invalid.substring(0, rsize);



   var rounded = "" + (fltin + (fltin - parseFloat(strin.substring(0, rsize))));



   return rounded.substring(0, rsize);



}