Image1 = new Image(130,417);
Image1.src = "titrate2.gif";

function checklabel(){
var label = new Array();
for (i=1; i<13; i++){
label[i]=document.getElementById("label" + i);}
label[1].style.left="124px"; label[1].style.top="130px";
label[2].style.left="391px"; label[2].style.top="227px";
label[3].style.left="245px"; label[3].style.top="346px";
label[4].style.left="-4px"; label[4].style.top="349px";
label[5].style.left="190px"; label[5].style.top="30px";
label[6].style.left="440px"; label[6].style.top="65px";
label[9].style.left="290px"; label[9].style.top="210px";
label[10].style.left="40px"; label[10].style.top="150px";
for (i=7; i<9; i++){
label[i].style.visibility="hidden";}
for (i=11; i<13; i++){
label[i].style.visibility="hidden";}
}

var x = 200;
function titrate(){
if (!document.getElementById) return;
titrant=document.getElementById("column");
apparatus=document.getElementById("appset");
if (x != 95) x=x-5;
if (x==95) {apparatus.src="titrate2.gif"; document.getElementById("titre").value="23.75"; document.getElementById("but3").style.visibility="visible"; return;}
titrant.style.height=x;
window.setTimeout("titrate()", 200);
}

function restart(){
if (!document.getElementById) return;
titrant=document.getElementById("column");
apparatus=document.getElementById("appset");
apparatus.src="titrate1.gif";
titrant.style.height="200px";
document.getElementById("titre").value="";
document.getElementById("but3").style.visibility="hidden";
x=200;
}

function checkcalc(y){
if (!document.getElementById) return;
answer=document.getElementById("calc" +y);
if (y==1) {(answer.value==0.00143) ? alert("Correct !") : alert("Try again !")};
if (y==2) {(answer.value==0.000715 || answer.value==0.000714 || answer.value==0.000713) ? alert("Correct !") : alert("Try again !")};
if (y==3) {answer=answer.value*1000; answer=Math.floor(answer); answer=answer/1000; (answer==0.028) ? alert("Correct !") : alert("Try again !")};
if (y==4) {answer=answer.value*10; answer=Math.round(answer); answer=answer/10; (answer==4.9) ? alert("Correct !") : alert("Try again !")};
}

function resetcalc(){
if (!document.getElementById) return;
for (var y=1; y<5; y++) {answer=document.getElementById("calc" +y);
answer.value="";}
}