function forceValidFloat(n){if(n.length==0)return'';var valids='0123456789';var hasDot=false;var r='';var c;for(var i=0;i<n.length;++i){c=n.charAt(i);if(c=='-'&&r.length==0){r+='-'}else if((c=='.'||c==',')&&!hasDot){r+=(r.length==0||r=='-')?'0.':'.';hasDot=true}else if(valids.indexOf(c)!=-1){r+=c}}return r}function convertCtoF(){var cel=document.getElementById("cel");var far=document.getElementById("far");far.value='';cel.value=forceValidFloat(cel.value);if(cel.value.length==0||cel.value=='-'||cel.value=='-0'||cel.value=='-0.')return;if(cel.value.charAt(cel.value.length-1)!='.')cel.value=cel.value%10000;var temp=((9/5)*parseFloat(cel.value)+32).toPrecision(8);while(temp.indexOf('.')!=-1&&(temp.charAt(temp.length-1)=='0'||temp.charAt(temp.length-1)=='.'))temp=temp.substr(0,temp.length-1);far.value=temp}function convertFtoC(){var cel=document.getElementById("cel");var far=document.getElementById("far");cel.value='';far.value=forceValidFloat(far.value);if(far.value.length==0||far.value=='-'||far.value=='-0'||far.value=='-0.')return;if(far.value.charAt(far.value.length-1)!='.')far.value=far.value%10000;var temp=((5/9)*(parseFloat(far.value)-32)).toPrecision(8);while(temp.indexOf('.')!=-1&&(temp.charAt(temp.length-1)=='0'||temp.charAt(temp.length-1)=='.'))temp=temp.substr(0,temp.length-1);cel.value=temp}