function check(ad)
{
	var ch=ad.value;
	if(isNaN(ch))
	{
		var df=ch.substring(0,(ch.length-1))
		ad.value=df;
	}	
}

function fat()
{
	var wt = document.first.wg.value;
	var wa = document.first.wa.value;
	var wr = document.first.wr.value;
	var h = document.first.h.value;
	var f = document.first.f.value;
	
	var op = document.first.opt1.value;
	
	//If value is not given for weight
	if(wt=="")
	{
		alert("Enter the value for weight");
	}

	//If weight is less than 10
	else if(wt<=10)
	{
		alert("Weight should be greater than 10kgs");
	}
	
	//If weight is pounds and less than 22lbs
	else if(op=="pounds" && wt<=22)
	{
		alert("Weight should be greater than 22lbs");
	}
	else{
		if(op=="kilograms")
		{
			wt=wt*2.2;
		}
		if(document.first.m.checked==true){
			var f1 = (wt * 1.082) + 94.42;
			var f2 = wa * 4.15;
			var l = f1-f2;
			var b = wt - l;
			var bf = (b * 100) / wt;
			document.first.r.value = Math.round(bf*100)/100;
			if(bf>=2 && bf<=5)
			{
				document.first.desc.value= "Essential Fat.";
			}
			else if(bf>=6 && bf<=13)
			{
				document.first.desc.value= "Athletes.";
			}
			else if(bf>=14 && bf<=17)
			{ 
				document.first.desc.value= "Fitness.";
			}
			else if(bf>=18 && bf<=25)
			{
				document.first.desc.value= "Acceptable.";
			}
			else if(bf>25)
			{
				document.first.desc.value= "Obese.";
			}
			else{
				document.first.desc.value= "";
			}
		}
		else if(document.first.fe.checked==true){
			var f1 = (wt * 0.732) + 8.987;
			var f2 = wr / 3.140;
			var f3 = wa * 0.157;
			var f4 = h * 0.249;
			var f5 = f * 0.434;
			var l = f1 + f2 - f3 - f4 + f5;
			var b = wt - l;
			var bf = (b * 100) / wt;
			document.first.r.value = Math.round(bf*100)/100;
			if(bf>=10 && bf<=12)
			{
				document.first.desc.value= "Essential Fat.";
			}
			else if(bf>=14 && bf<=20)
			{
				document.first.desc.value= "Athletes.";
			}
			else if(bf>=21 && bf<=24)
			{ 
				document.first.desc.value= "Fitness.";
			}
			else if(bf>=25 && bf<=31)
			{
				document.first.desc.value= "Acceptable.";
			}
			else if(bf>32)
			{
				document.first.desc.value= "Obese.";
			}
			else{
				document.first.desc.value= "";
			}
		}
		else{
			alert("Select the gender");
		}
		
	}
	
}
function unit()  //Weight conversion
{
	var pp = document.first.opt1.value;
	var ww = document.first.wg.value;
	
	//Kilogram to pounds
	if(pp=="pounds")	
	{
		document.first.wg.value = Math.round((ww*2.2)*100)/100;
	}

	//Pounds to kilograms
	else
	{
		document.first.wg.value=Math.round(ww/2.2);
	}
}
function chk(){
	var xx = document.first.m;
	if(xx.checked=true){
	document.first.fe.checked = false;
	}
}	
function chk1(){
	var xx = document.first.fe;
	if(xx.checked=true){
	document.first.m.checked = false;
	}
}	
		


function color(test)
{

	for(var j=2; j<10; j++)
	{
		var myI=document.getElementsByTagName("input").item(j);
		//myI.setAttribute("style",ch);
		myI.style.backgroundColor=test;
	}
}


function color1(test)
{
var myI=document.getElementsByTagName("table").item(0);
//myI.setAttribute("style",ch);
myI.style.backgroundColor=test;
}