// calculul dimensiunii 

	  
	  //var bun=3;
	  //var msg;
	  function Diferenta_dums(section1, profile1, diameter1, section2, profile2, diameter2 )
	  {
		  	
			///start roata veche
			rol1=Math.round((((diameter1/2)*25.4)+(section1*(profile1/100)))*100)/100;
		 	wheelradius1=(diameter1/2);	  
		  	circ1=Math.round((rol1*2*3.14159)*100)/100;
			//start roata noua
		 	rol2=Math.round((((diameter2/2)*25.4)+(section2*(profile2/100)))*100)/100;
		 	wheelradius2=(diameter2/2);
    		circ2=Math.round((rol2*2*3.14159)*100)/100;
			///calculeaza diferentza
			difference=Math.round((circ2-circ1)*100)/100;
		 	differencepercent=Math.round(((difference/circ1)*100)*100)/100;
		 	realspeed=Math.round((Math.round((((differencepercent/100)*70)+70)*100)/100)*1.609);
		 
		 	document.wheelsizes.difference.value=difference;
		 	document.wheelsizes.differencepercent.value=differencepercent;
		 	if((differencepercent<-3)||(differencepercent>3))
			{
				//document.wheelsizes.erorr.value="Valoare in afara intervalului admis!";	
				document.getElementById("result_good").style.display="none";
				document.getElementById("result_bad").style.display="block";
			}
			else
			{
//				document.wheelsizes.erorr.value="Valoare in intervalul admis!";	
				document.getElementById("result_good").style.display="block";
				document.getElementById("result_bad").style.display="none";
			}
			document.wheelsizes.realspeed.value=realspeed;
			
			/*overallscalar=(250/rol1);
			currentouter=(rol1*overallscalar);
			currentinner=(wheelradius1*overallscalar*25.4);
			newouter=(rol2*overallscalar);
			newinner=(wheelradius2*overallscalar*25.4);*/
		 
	  }
	  function showme()
	  {
		  document.write(msg);
		 
	  }