// JavaScript Document
thepage="Unit Conversion - Smaller/Larger"
//globals
//updated 12/02/02-netscape 7
howlng=""
totl=0
corrt=0
tried=0
which="" 
relation=""
tried=0 
theanswer=""
relation=""
thefirst=""
thesecond=""
cfactor=0
theans=0
myans=0
function MakeArray(n){
	this.length=n
	for (var i=1;i<=n;i++){
	this[i]= 0}
}
mets=new Array(100)
function pairs(name,factor){
	this.name=name
	this.factor=factor
}
mets[1]=new pairs("millimeters",25.4)
mets[2]=new pairs("centimeters",2.54)
mets[3]=new pairs("meters",.0254)
mets[4]=new pairs("kilometers",.0000254)
mets[11]=new pairs("milliliters",946)
mets[12]=new pairs("liters",.946)
mets[21]=new pairs("milligrams",454000)
mets[22]=new pairs("grams",454)
mets[23]=new pairs("kilograms",.454)
mets[31]=new pairs("g/mL",1)
mets[32]=new pairs("g/L",1000)
mets[33]=new pairs("kg/L",1)
mets[34]=new pairs("mg/mL",1000)
mets[35]=new pairs("kg/mL",.000001)
eng=new Array(100)
eng[1]=new pairs("inches",1)
eng[2]=new pairs("feet",.0833)
eng[3]=new pairs("yards",.028)
eng[11]=new pairs("fl. ounces",32)
eng[12]=new pairs("quarts",1)
eng[13]=new pairs("gallons",.25)
eng[21]=new pairs("ounces",16)
eng[22]=new pairs("pounds",1)
function parts(p1,p2,p3,p4,p5,p6){
	this.p1=p1
	this.p2=p2
	this.p3=p3
	this.p4=p4
	this.p5=p5
	this.p6=p6
}
compare=new Array(5)
compare[1]=new parts("a greater"," than ","a numeric decrease","smaller")
compare[2]=new parts("a lesser"," than ","a numeric increase","larger")
compare[3]=new parts(" the same "," as ","no numeric change","the same")
ansphrase=new Array(5)
ansphrase[1]=new parts("Since  "," is "," quantity ",", the conversion will result in a ",".Thus the correct answer is<b> ",".</b>")
cdphrase="This is a compound dimension, so you must consider the effects of both dimensions."
function clearbig(){
	document.forms[0].big[0].checked=0
	document.forms[0].big[1].checked=0
	document.forms[0].big[2].checked=0
	document.forms[0].first.value=""
	document.forms[0].second.value=""
}
function clear(){
	document.forms[0].results.value=""
	tried=0
	clearbig()
	clearansspot()
}
function parts(p1,p2,p3,p4,p5,p6){
	this.p1=p1
	this.p2=p2
	this.p3=p3
	this.p4=p4
	this.p5=p5
	this.p6=p6
}
function startit(){
	tried=0
	clear()
 	totl++
	document.forms[0].total.value=totl
	document.forms[0].results.value=""
	option=Math.ceil(4*Math.random())
	if(option==1){
		val1=Math.ceil(4*Math.random())
		val2=Math.ceil(3*Math.random())
		}
	if(option==2){
		val1=10+Math.ceil(2*Math.random())
		val2=10+Math.ceil(3*Math.random())
		}
	if(option==3){
		val1=20+Math.ceil(3*Math.random())
		val2=20+Math.ceil(2*Math.random())
		}
	if(option==4){
		val1=30+Math.ceil(5*Math.random())
		val2=val1
		while(val2==val1)val2=30+Math.ceil(5*Math.random())
		}
	if(option<4)cfactor=eng[val2].factor/mets[val1].factor
	else cfactor=mets[val2].factor/mets[val1].factor
	if(Math.random()>.5){
	sunit=mets[val1].name
	document.forms[0].first.value=mets[val1].name
	if(option<4){
		funit=eng[val2].name;
		document.forms[0].second.value=eng[val2].name;
		}
		else{
		 document.forms[0].second.value=mets[val2].name;
		 funit=mets[val2].name;
		}
	}
	else{
	cfactor=1/cfactor
	funit=mets[val1].name
	document.forms[0].second.value=mets[val1].name
	if(option<4){
		sunit=eng[val2].name
		document.forms[0].first.value=eng[val2].name;
		}
	else {
		document.forms[0].first.value=mets[val2].name;
		sunit=mets[val2].name
		}
	}
	makeanswer(option)
	} 
function makeanswer(which){
	if(which==4)theanswer=cdphrase;
	else theanswer="";
	if(cfactor<1)key=1
	if(cfactor==1)key=3
	if(cfactor>1)key=2
	theanswer=theanswer+ansphrase[1].p1+funit+ansphrase[1].p2+compare[key].p1+ansphrase[1].p3+compare[key].p2+sunit+ansphrase[1].p4+compare[key].p3+ansphrase[1].p5+compare[key].p4
}
function screen(anser){
	myans=anser
	if(cfactor>1)theans=1
	if(cfactor<1)theans=0
	if(cfactor==1)theans=2
	answer()
}
function answer(anser){
if(tried==1){
		alert("Sorry, you've already submitted this problem! Get a new one!")
		}
else{	tried=1
	if (myans==theans ){	
	document.forms[0].results.value="correct"
		corrt++
		document.forms[0].correct.value=corrt
		tried=1
}	
else {
		document.forms[0].results.value="incorrect"
		showanswer()}
}
tried=1
}