function ClearForm(){
		    document.getElementById('teza').value = "";
		    document.getElementById('visina').value = "";
		    document.getElementById('ITT').value = "";
		    document.getElementById('minW').value = "";
		    document.getElementById('maxW').value = "";
		}
		function bmi(teza, visina) {
		          bmindx=teza/eval(visina*visina);
		          return bmindx;
		}
		function checkform() {
		       if (document.getElementById('teza').value==null||document.getElementById('teza').value.length==0 || document.getElementById('visina').value==null||document.getElementById('visina').value.length==0){
		            alert("\nIzpolnite težo in višino");
		            return false;
		       }
		       else if (parseFloat(document.getElementById('visina').value) <= 0||
		                parseFloat(document.getElementById('visina').value) >=220||
		                parseFloat(document.getElementById('teza').value) <= 0||
		                parseFloat(document.getElementById('teza').value) >=300){
		                alert("\nVnesite težo v kilogramih in višino v  centimetrih" );
		                ClearForm();
		                return false;
		       }
		       return true;
		}
		function getITT() {
		       if (checkform()) {
		       var answer=Math.round(bmi(document.getElementById('teza').value, document.getElementById('visina').value/100));
		       document.getElementById('ITT').value=answer;
		       document.getElementById('minW').value=Math.round(21*(document.getElementById('visina').value/100)*(document.getElementById('visina').value/100));
		       document.getElementById('maxW').value=Math.round(21*(document.getElementById('visina').value/100)*(document.getElementById('visina').value/100));
     	       document.getElementById('maxW').value=Math.round(25*(document.getElementById('visina').value/100)*(document.getElementById('visina').value/100));
				if (answer>32) {
		          document.getElementById('answer').value="Izredna debelost !" ;
		       }
		       else if (answer >=30 && answer <=32) {
		          document.getElementById('answer').value="Velika debelost  !";
		       }
		       else if (answer >=27 && answer <30) {
		          document.getElementById('answer').value="Debelost !";
		       }
		       else if (answer >25 && answer <27) {
		          document.getElementById('answer').value="Zmerna debelost !";
		       }
		       else if (answer >=19 && answer <=25) {
		          document.getElementById('answer').value="Normalna teža";
		       }
		       else if (answer <19 ) {
		          document.getElementById('answer').value="Presuhi ste !";
		       }
		
		       }
		       return;
		}